Population Sample (population + sample)

Distribution by Scientific Domains
Distribution within Medical Sciences

Kinds of Population Sample

  • general population sample
  • representative population sample


  • Selected Abstracts


    Allele Frequency Data for 19 Short Tandem Repeats (PowerPlex® 16 and FFFl) in a Belgian Population Sample

    JOURNAL OF FORENSIC SCIENCES, Issue 2 2006
    Ronny Decorte Ph.D
    POPULATION: Belgian Caucasians (Dutch speaking; n=198). [source]


    Analysis of Y-STR Loci in a Population Sample from Northeast China

    JOURNAL OF FORENSIC SCIENCES, Issue 1 2006
    Xiuling Wang Ph.D.
    POPULATION: A total of 141 unrelated Chinese Han male individuals living in Liaoning in northeast China. [source]


    Incidence of Dementia, Alzheimer's Disease, and Vascular Dementia in Italy.

    JOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 1 2002
    The ILSA Study
    OBJECTIVES: To estimate the incidence of dementia, Alzheimer's disease (AD), and vascular dementia (VaD) in older Italians and evaluate the relationship of age, gender, and education to developing dementia. DESIGN: Cohort incidence study in the context of the Italian Longitudinal Study on Aging. SETTING: Population sample from eight Italian municipalities. PARTICIPANTS: A dementia-free cohort of 3,208 individuals (aged 65,84), individuated after a baseline evaluation performed in 1992 / 93, aimed at detecting prevalent cases. MEASUREMENTS: The dementia-free cohort was reexamined in 1995 to identify incident cases. The Mini-Mental State Examination (cutoff 23 / 24) was employed to screen for dementia. Trained neurologists evaluated the individuals who screened positive. Final diagnoses had to meet Diagnostic and Statistical Manual of Mental Disorders, Third Edition, Revised criteria for dementia, National Institute of Neurological and Communicative Disorders and Stroke,Alzheimer's Disease and Related Disorders Association criteria for AD, and International Classification of Diseases, Tenth Revision criteria for VaD. RESULTS: Before the follow-up examination, 382 individuals had died (232 had reliable information). Of the 2,826 survivors, 2,266 completed the study. Overall, 127 new dementia cases were identified. Average incidence rates per 1,000 person-years were 12.47 (95% confidence interval (CI) = 10.23,14.72) for dementia, 6.55 (95% CI = 4.92,8.17) for AD, and 3.30 (95% CI = 2.14,4.45) for VaD. Both AD and VaD showed age-dependent patterns. Education was protective against dementia and AD. Women carried a significantly higher risk of developing AD (hazard ratio = 1.67, 95% CI = 1.02,2.75), and men of developing VaD (hazard ratio = 2.23, 95% CI = 1.06,4.71). CONCLUSIONS: Incidence of dementia in Italy paralleled that in most industrialized countries. About 150,000 new cases per year are expected. A significant gender effect was evidenced for major dementia subtypes. The burden of VaD, especially in men, offers opportunities for prevention. [source]


    Population genetics of the European trout (Salmo trutta L.) migration system in the river Rhine: recolonisation by sea trout

    ECOLOGY OF FRESHWATER FISH, Issue 1 2005
    A. Schreiber
    Abstract , Allozyme genetics (34 loci) is studied in up to 1010 European trout (Salmo trutta) from the Rhine, Meuse, Weser, Elbe and Danube river systems in Central Europe. Population samples from single collection sites, chiefly small streams (GCG = 0.2126), rather than the divergence of the trout from Atlantic and Danubian drainages (GSG = 0.0711), contributed to the overall gene diversity of GST = 0.2824. Sea trout (n = 164) and brown trout (n = 767) in Atlantic rivers adhere to the same biogeographical stock, but anadromous trout from the Rhine and the Elbe display more genetic cohesion than resident brown trout from the Rhine system alone. Strayers from the Elbe could have founded the recently re-established sea trout population of the Rhine, after a few decades of absence or precarious rarity. Migrants may even connect the Rhine and Elbe stocks by ongoing gene flow. A release,recapture study confirms that all trout in the Rhine belong to one partly migratory population network: Six of 2400 juvenile sea trout released into a tributary of the Rhine were later recorded as emigrants to the Rhine delta, against three of 1600 released brown trout. One migrant had entered the open North Sea, but the other dispersers were recorded in fresh waters of the Rhine delta (Ijsselmeer, Amstelmeer). Stocking presumably elevated both heterozygosity and fixation indices of brown trout, but this effect is subtle within the range of the Atlantic population group. Improved sea trout management in the Rhine, and modifications to brown trout stocking in the upper Danubian area are recommended. [source]


    Analysis of TPI gene promoter variation in three sub-Saharan Africa population samples

    AMERICAN JOURNAL OF HUMAN BIOLOGY, Issue 1 2009
    Licínio Manco
    Population samples from Angola, Mozambique, and S. Tomé e Príncipe were screened for the TPI gene promoter variants -5A,G, -8G,A and -24T,G. Three haplotypes were identified in the three populations: the haplotype -5A-8G-24T (average frequency 65.3%) and two less common haplotypes -5G-8G-24T (average frequency 24.7%) and -5G-8A-24T (average frequency 10.0%). A population sample from Central Portugal showed the haplotype -5A-8G-24T in 139 chromosomes and one subject heterozygous for haplotype -5G-8A-24G. The exact test of sample differentiation among three groups of malaria-infected individuals classified according to the severity of the disease showed no significant differences. We confirmed TPI gene diversity in sub-Saharan Africa, but we could not detect any association between TPI promoter variation and a malarial protective effect. Larger scale epidemiological studies are thus required to clarify this putative mechanism of natural host defense against this worldwide public health problem. Am. J. Hum. Biol., 2009. © 2008 Wiley-Liss, Inc. [source]


    A systematic review of the diagnostic classifications of traumatic dental injuries

    DENTAL TRAUMATOLOGY, Issue 2 2006
    Karla Maria Pugliesi da Costa Feliciano
    Abstract,,, A systematic review of the literature was undertaken to evaluate the criteria used for the diagnostic classification of traumatic dental injuries from an epidemiological standpoint. The methodology used was that suggested by the Cochrane Collaboration and the National Health Service. A total of 12 electronic bibliographical databases (BBO, BioMed Central, Blackwell Synergy, Cochrane, DARE, EMBASE, HighWire, LILACS, MEDLINE, PubMed Central, SciELO, SciSearch) and the World Wide Web were searched. There was no attempt to specify the strategy in relation to date, study design, or language. The last search was performed in May 2003. Two reviewers screened each record independently for eligibility by examining titles, abstracts, keywords and using a standardized reference form. Disagreements were resolved through consensus. The final study collection consisted of 164 articles, from 1936 to 2003, and the population sample ranged from 38 to 210 500 patients. 54 distinct classification systems were identified. According to the literature, the most frequently used classification system was that of Andreasen (32%); as regards the type of injury, the uncomplicated crown fracture was the most mentioned lesion (88.5%). Evidence supports the fact that there is no suitable system for establishing the diagnosis of the studied injuries that could be applied to epidemiological surveys. [source]


    Generalized anxiety disorder with and without excessive worry in Hong Kong

    DEPRESSION AND ANXIETY, Issue 10 2009
    Sing Lee M.B.B.S.
    Abstract Background: Two previous U.S. studies found that although generalized anxiety disorder (GAD) without self-perceived excessive worry was milder than GAD with excessive worry, its persistence, impairment, and risk for subsequent onset of other mental disorders were still substantial. This study examined the implications of relaxing the "excessiveness" criterion on the prevalence and socio-demographic profile of GAD in a Chinese population sample by considering both self and others' perception of excessive worry. Method: 2,005 respondents aged 15,65 years participated in a structured telephone interview that covered socio-demographic profile, 12-month DSM-IV diagnosis of GAD, core depressive symptoms, longest duration of worry episode, number of domains of worry, impairment measured by the Sheehan Disability Scale, and treatment-seeking. Excessive worry was assessed from the perception of both respondents and others as reported by respondents. Result: The 12-month prevalence of GAD increased from 3.4 to 4% when the excessiveness requirement was relaxed. Excessive GAD and nonexcessive GAD had similar socio-demographic, symptom, chronicity, impairment, depressive symptom, and treatment-seeking profiles. Conclusion: GAD without excessive worry was less common than GAD with excessive worry but was likely to be a valid nosological entity. Future iterations of the DSM-IV should clarify whether excessive worry should be retained and, if so, how individuals who only reported excessive worries perceived by others should be optimally assessed. Depression and Anxiety, 2009. © 2009 Wiley-Liss, Inc. [source]


    The prognosis and incidence of social phobia in an elderly population.

    ACTA PSYCHIATRICA SCANDINAVICA, Issue 1 2010
    A 5-year follow-up
    Karlsson B, Sigström R, Waern M, Östling S, Gustafson D, Skoog I. The prognosis and incidence of social phobia in an elderly population. A 5-year follow-up. Objective:, To examine the prognosis and incidence of social fears and phobia in an elderly population sample followed for 5 years. Method:, A general population sample (N = 612) of non-demented men (baseline age 70) and women (baseline age 70 and 78,86) was investigated in 2000,2001 and in 2005,2006 with semi-structured psychiatric examinations including the Comprehensive Psychopathological Rating Scale, and the Mini International Neuropsychiatric Interview. Social phobia was diagnosed according to the DSM-IV criteria. Results:, Among nine individuals with DSM-IV social phobia in 2000, 5 (55.6%) had no social fears in 2005, and 1 (11.1%) still met the criteria for DSM-IV social phobia. Among individuals without DSM-IV social phobia in 2000 (N = 603), 12 (2.0%) had DSM-IV social phobia in 2005. Conclusion:, These findings challenge the notion that social phobia is a chronic disorder with rare occurrence in old age. [source]


    Child to adult continuities of psychopathology: a 24-year follow-up

    ACTA PSYCHIATRICA SCANDINAVICA, Issue 3 2009
    J. Reef
    Objective:, To determine continuities of mental health problems of children across a 24-year follow-up period. Method:, In 1983, parent ratings of emotional and behavioral problems were collected with the Child Behavior Checklist (CBCL) in a general population sample of 2076 children. Twenty-four years later, 1365 participants completed Adult Self-Reports (ASR) to assess emotional and behavioral problems. Results:, Of the participants who were classified as deviant in childhood, 22.2% were also classified as deviant in adulthood. Both homotypic and heterotypic continuity was found. Childhood aggressive, delinquent, and anxious/depressed problems were associated with most adult psychopathology. Attention problems did not predict later problems independently. Conclusion:, Even though assessed with parent-reports in childhood and analogous self-reports in adulthood, and over a large period of 24 years, continuity of psychopathology was found from childhood into adulthood. Anxious/depressed problems, delinquent behavior and aggressive behavior in childhood are core predictors for adult psychopathology. [source]


    Multiple adverse outcomes over 30 years following adolescent substance misuse treatment

    ACTA PSYCHIATRICA SCANDINAVICA, Issue 6 2009
    S. Hodgins
    Objective:, To compare outcomes over 30 years experienced by individuals who as adolescents entered substance misuse treatment and a general population sample. Method:, All 1992 individuals seen at the only clinic for substance misusing adolescents in Stockholm from 1968 to 1971 were compared to 1992 individuals randomly selected from the Swedish population, matched for sex, age and birthplace. Death, hospitalization for physical illness related to substance misuse, hospitalization for mental illness, substance misuse, criminal convictions and poverty were documented from national registers. Results:, Relative risks of death, physical illness, mental illness, substance misuse, criminal convictions and poverty were significantly elevated in the clinic compared to the general population sample. After adjustment for substance misuse in adulthood, the risks of death, physical and mental illness, criminality and poverty remained elevated. Conclusion:, Adolescents who consult for substance misuse problems are at high risk for multiple adverse outcomes over the subsequent 30 years. [source]


    Ethnicity, social disadvantage and psychotic-like experiences in a healthy population based sample

    ACTA PSYCHIATRICA SCANDINAVICA, Issue 3 2009
    C. Morgan
    Objective: We sought to investigate the prevalence and social correlates of psychotic-like experiences in a general population sample of Black and White British subjects. Method: Data were collected from randomly selected community control subjects, recruited as part of the ÆSOP study, a three-centre population based study of first-episode psychosis. Results: The proportion of subjects reporting one or more psychotic-like experience was 19% (n = 72/372). These were more common in Black Caribbean (OR 2.08) and Black African subjects (OR 4.59), compared with White British. In addition, a number of indicators of childhood and adult disadvantage were associated with psychotic-like experiences. When these variables were simultaneously entered into a regression model, Black African ethnicity, concentrated adult disadvantage, and separation from parents retained a significant effect. Conclusion: The higher prevalence of psychotic-like experiences in the Black Caribbean, but not Black African, group was explained by high levels of social disadvantage over the life course. [source]


    Eating problems at age 6 years in a whole population sample of extremely preterm children

    DEVELOPMENTAL MEDICINE & CHILD NEUROLOGY, Issue 2 2010
    MUTHANNA SAMARA
    Aim, The aim of this study was to investigate the prevalence of eating problems and their association with neurological and behavioural disabilities and growth among children born extremely preterm (EPC) at age 6 years. Method, A standard questionnaire about eating was completed by parents of 223 children (125 males [56.1%], 98 females [43.9%]) aged 6 years who were born at 25 weeks' gestation or earlier (mean 24.5wks, SD 0.7wks; mean birthweight 749.1g, SD 116.8g), and parents of 148 classmates born at term (66 males [44.6%], 82 females [55.4%]). All children underwent neurological, cognitive, and anthropometric assessment, and parents and teachers completed a behaviour scale. Results, Eating problems were more common among the EPC than the comparison group (odds ratio [OR] 3.6, 95% confidence interval [CI] 2.1,6.3), including oral motor (OR 5.2, 95% CI 2.8,9.9), hypersensitivity (OR 3.0, 95% CI 1.6,5.6), and behavioural (OR 3.8, 95% CI 1.9,7.6) problems. Group differences were reduced after adjustment for cognitive impairment, neuromotor disability, and other behaviour problems. EPC with eating problems were shorter, lighter, and had lower mid-arm circumference and lower body mass index (BMI) even after adjusting for disabilities, gestational age, birthweight, and feeding problems at 30 months. Interpretation, Eating problems are still frequent in EPC at school age. They are only partly related to other disabilities but make an additional contribution to continued growth failure and may require early recognition and intervention. [source]


    Prevalence and characteristics of autistic spectrum disorders in the ALSPAC cohort

    DEVELOPMENTAL MEDICINE & CHILD NEUROLOGY, Issue 9 2008
    Emma Williams MSc PhD
    The aim of this study was to determine the prevalence of autistic spectrum disorder (ASD) within a large representative population sample: the Avon Longitudinal Study of Parents and Children (ALSPAC). Cases of ASD were identified from the clinical notes of children in the ALSPAC with a suspected developmental disorder and from the Pupil Level Annual Schools Census (PLASC) for England in 2003. Seventy-one cases of ASD diagnosed after a multidisciplinary assessment were identified from health records. There were an additional 15 cases from PLASC data in which ASD was mentioned as a principal difficulty, thus giving a total of 86 children diagnosed by the age of 11 years. Prevalence of ASD per 10 000 population at 11 years was 51.1 for those with a multi-professional diagnosis, and 61.9 if cases from education were included, made up of 21.6 for childhood autism, 10.8 for atypical autism, 16.6 for Asperger syndrome, and 13.0 for unspecified ASD. The male:female ratio was 6.8:1. Median age at diagnosis ranged from 45 months in childhood autism to 116 months in Asperger syndrome. A comorbid developmental disorder was recorded in 33.8% of cases, including learning disability, in 14.7%, epilepsy in 10.3%, and mixed developmental disorder in 4.4%. We conclude that the prevalence of ASD diagnosed at 11 years in a UK representative population-based sample is at least 51.1/10 000. [source]


    Ready to drinks are associated with heavier drinking patterns among young females

    DRUG AND ALCOHOL REVIEW, Issue 4 2008
    TAISIA HUCKLE
    Abstract Aim. To report patterns of use of ready to drinks (RTDs) and to assess if RTD consumers have heavier drinking patterns. RTDs were introduced in 1995. Method. Data from a general population sample of 7201 respondents aged 14,65 years, in New Zealand in 2004, were modelled. Results. Nineteen per cent of respondents consumed RTDs. Respondents aged 14,17 and 18,24 years and females were the largest consumers of RTDs. Compared to beer, wine or spirits, being an RTD consumer predicted (1) higher typical occasion quantities for respondents aged 14,17, 18,24 and 25+ years and (2) heavier drinking for those aged 14,17 and 18,24 years. When amounts of beverages consumed were modelled, quantity of RTDs predicted higher typical occasion quantities among females of all ages. Among males beer was more predictive. Similar results were found for the heavier drinking measure. For 14,17-year-old females, RTDs consumption predicted higher annual frequency, but for the other females and males the amount of wine or beer consumed predicted higher frequency. Conclusion. RTDs were most popular among young people aged 14,17 years, and females. RTDs predicted higher typical occasion alcohol consumption and heavier drinking better than any other beverage for females aged 14,17 years. For the other age and gender groups, other beverages predicted higher quantity and frequency consumption. [source]


    Trajectories of resilience over 25 years of individuals who as adolescents consulted for substance misuse and a matched comparison group

    ADDICTION, Issue 7 2010
    Peter Larm
    ABSTRACT Aims To examine trajectories of resilience over 25 years among individuals who as adolescents received treatment for substance misuse, the clinical sample (CS) and a matched general population sample (GP). Design Comparison of the CS and GP over 25 years using Swedish national registers of health care and criminality. Setting A substance misuse clinic for adolescents in an urban area in Sweden. Measurements Resilience was defined as the absence of substance misuse, hospitalizations for physical illnesses related to substance misuse, hospitalization for mental illness and law-abiding behaviour from ages 21 to 45 years. Participants The CS included 701 individuals who as adolescents had consulted a clinic for substance misuse. The GP included 731 individuals selected randomly from the Swedish population and matched for age, sex and birthplace. Findings A total of 52.4% of the GP and 24.4% of the CS achieved resilience in all domains through 25 years. Among the CS, another one-third initially displayed moderate levels of resilience that rose to high levels over time, one-quarter displayed decreasing levels of resilience over time, while 9.3% showed little but improving resilience and 8.8% showed no resilience. Levels of resilience were associated with the severity of substance misuse and delinquency in adolescence. Conclusions Individuals who had presented substance misuse problems in adolescence were less likely to achieve resilience over the subsequent 25 years than was a matched general population sample, and among them, four distinct trajectories of resilience were identified. The severity and type of problems presented in adolescence distinguished the four trajectories. [source]


    The utility of online panel surveys versus computer-assisted interviews in obtaining substance-use prevalence estimates in the Netherlands

    ADDICTION, Issue 10 2009
    Renske Spijkerman
    ABSTRACT Aims Rather than using the traditional, costly method of personal interviews in a general population sample, substance-use prevalence rates can be derived more conveniently from data collected among members of an online access panel. To examine the utility of this method, we compared the outcomes of an online survey with those obtained with the computer-assisted personal interviews (CAPI) method. Design Data were gathered from a large sample of online panellists and in a two-stage stratified sample of the Dutch population using the CAPI method. Setting The Netherlands. Participants The online sample comprised 57 125 Dutch online panellists (15,64 years) of Survey Sampling International LLC (SSI), and the CAPI cohort 7204 respondents (15,64 years). Measurements All participants answered identical questions about their use of alcohol, cannabis, ecstasy, cocaine and performance-enhancing drugs. The CAPI respondents were asked additionally about internet access and online panel membership. Both data sets were weighted statistically according to the distribution of demographic characteristics of the general Dutch population. Findings Response rates were 35.5% (n = 20 282) for the online panel cohort and 62.7% (n = 4516) for the CAPI cohort. The data showed almost consistently lower substance-use prevalence rates for the CAPI respondents. Although the observed differences could be due to bias in both data sets, coverage and non-response bias were higher in the online panel survey. Conclusions Despite its economic advantage, the online panel survey showed stronger non-response and coverage bias than the CAPI survey, leading to less reliable estimates of substance use in the general population. [source]


    A taxometric study of alcohol abuse and dependence in a general population sample: evidence of dimensional latent structure and implications for DSM-V

    ADDICTION, Issue 5 2009
    Tim Slade
    ABSTRACT Aims To explore, with the aid of taxometric analysis, whether alcohol abuse and alcohol dependence are each conceptualized most effectively as single latent dimensions or distinct latent categories. Design Data were taken from a nationally representative cross-sectional epidemiological survey of psychiatric and substance use disorders. Setting General population of Australia. Participants A subsample of all respondents who had consumed at least 12 drinks in the year prior to the survey and who had consumed at least three drinks on at least one single day (n = 4920 of a possible 10 641). Measurements DSM-IV criteria for alcohol abuse and dependence were assessed with the Composite International Diagnostic Interview, version 2.1. Two independent taxometric procedures, MAXimum EIGenvalue (MAXEIG) and mean above minus below a cut (MAMBAC), together with analysis of simulated dimensional and categorical data sets, were carried out. Findings Consistent evidence was found for a single latent dimension underlying the symptoms of alcohol dependence. Less consistent evidence of dimensionality was found for the symptoms of alcohol abuse. Conclusions These findings support the growing consensus regarding the need for continuous measures of alcohol use disorders to complement the traditional categorical representations in upcoming versions of the major psychiatric classification systems. [source]


    Risk of harm among gamblers in the general population as a function of level of participation in gambling activities

    ADDICTION, Issue 4 2006
    Shawn R. Currie
    ABSTRACT Aims To examine the relationship between gambling behaviours and risk of gambling-related harm in a nationally representative population sample. Design Risk curves of gambling frequency and expenditure (total amount and percentage of income) were plotted against harm from gambling. Setting Data derived from 19 012 individuals participating in the Canadian Community Health Survey,Mental Health and Well-being cycle, a comprehensive interview-based survey conducted by Statistics Canada in 2002. Measurement Gambling behaviours and related harms were assessed with the Canadian Problem Gambling Index. Findings Risk curves indicated the chances of experiencing gambling-related harm increased steadily the more often one gambles and the more money one invests in gambling. Receiver operating characteristic analysis identified the optimal limits for low-risk participation as gambling no more than two to three times per month, spending no more than $501,1000CAN per year on gambling and investing no more than 1% of gross family income on gambling activities. Logistic regression modelling confirmed a significant increase in the risk of gambling-related harm (odds ratios ranging from 2.0 to 7.7) when these limits were exceeded. Conclusions Risk curves are a promising methodology for examining the relationship between gambling participation and risk of harm. The development of low-risk gambling limits based on risk curve analysis appears to be feasible. [source]


    The psychological determinants of low-rate daily smoking

    ADDICTION, Issue 10 2004
    Jean-François Etter
    ABSTRACT Aims To compare low-rate daily smokers (one to five cigarettes/day) with other daily smokers, using the Transtheoretical Model of Change as a framework. Design Mail survey with a follow-up after 7 months. Setting A randomly selected population sample in French-speaking Switzerland, in 1998. Participants A total of 2338 daily smokers aged 25 + years, including 95 smokers of one to five cigarettes/day, 324 smokers of six to 10 cigarettes/day, 399 smokers of 11,15 cigarettes/day and 1520 smokers of 16 + cigarettes/day, and 1765 people (75% of 2338) at 7-month follow-up. Findings Compared with smokers of 16 + cigarettes/day, low-rate smokers of one to five cigarettes/day included more women (67% versus 46%, P < 0.001), were 4 years younger (P < 0.001), were less motivated to quit smoking (62% versus 37% in the ,precontemplation' stage of change, P < 0.001), thought that quitting would be easier (,3.4 points on a 0,10 scale, P < 0.001) and were less bothered by the risk of smoking. Low-rate smokers were taking control more actively over their smoking, e.g. they more often stayed away from places where people smoked, sat in the no-smoking sections in public places and tried to delay as much as they could their first cigarette of the day. Only 45% of low-rate smokers were still in the same category 7 months later. Conclusions For many smokers, low-rate smoking may result from a conscious effort to limit their cigarette consumption. Being a low-rate smoker was a temporary condition for most people. Low-rate smokers should be considered as a specific, although heterogeneous group. [source]


    A longitudinal study of the effects of adolescent cannabis use on high school completion

    ADDICTION, Issue 5 2003
    Michael T. Lynskey
    ABSTRACT Objective ,To examine the extent to which weekly cannabis use during mid-adolescence may increase the risk of early school-leaving. Setting ,A prospective study of a general population sample of adolescents studied from ages 15,21 years in Melbourne, Australia. Method ,Computer-assisted self-completion questionnaires and telephone interviews conducted in six waves at ages 15,18 and again at age 21 in a sample of 1601 male and female school students. Results ,Weekly cannabis use, assessed prospectively, was associated with significantly increased risk of early school-leaving. This effect remained after adjustment for a range of prospectively assessed covariates including demographic characteristics, other substance use, psychiatric morbidity and antisocial behavior. There was suggestive evidence of an interaction between weekly cannabis use and age with the effects of weekly cannabis use on early school-leaving being strongest at the youngest ages and diminishing progressively with age. Conclusions ,Early regular cannabis use (weekly use at age 15) is associated with increased risk of early school-leaving. These effects of regular cannabis use may diminish with increasing age and are likely to operate through the social context within which cannabis is used and obtained. [source]


    Evidence for conditional sex differences in emotional but not in sexual jealousy at the automatic level of cognitive processing

    EUROPEAN JOURNAL OF PERSONALITY, Issue 1 2008
    Lars Penke
    Abstract The two evolutionary psychological hypotheses that men react more jealous than women to sexual infidelity and women react more jealous than men to emotional infidelity are currently controversial because of apparently inconsistent results. We suggest that these inconsistencies can be resolved when the two hypotheses are evaluated separately and when the underlying cognitive processes are considered. We studied jealousy with forced-choice decisions and emotion ratings in a general population sample of 284 adults aged 20,30 years using six infidelity dilemmas and recordings of reaction times. The sex difference for emotional jealousy existed for decisions under cognitive constraint, was also evident in the decision speed, increased for faster decisions, and was stronger for participants with lower education. No evidence for a sex difference in sexual jealousy was found. Our results support the view of a specific female sensitivity to emotional infidelity that canalizes the development of an adaptive sex difference in emotional jealousy conditional to the sociocultural environment. Copyright © 2007 John Wiley & Sons, Ltd. [source]


    Beyond resilients, undercontrollers, and overcontrollers? an extension of personality prototype research

    EUROPEAN JOURNAL OF PERSONALITY, Issue 1 2006
    Philipp Yorck Herzberg
    Prototypes of personality were investigated in two studies. In study I, clusters of Big-Five-based prototypes were examined using a general population sample of 1908 German adults. Convergent evidence suggested the appropriateness of a five-cluster solution, which corresponds to previously identified temperament based prototypes. In study II, the five-cluster solution was cross-validated in a sample of 256 prisoners. Moreover, it was shown that a population-based approach (using discriminant functions derived from study I) was superior over the traditional sample-based cluster approach (using Ward followed by k -means). The authors argue that future typological research can be sufficiently grounded on a five-prototype conception rather than on a three-prototype conception, and suggest a new and flexible assignment procedure. Copyright © 2006 John Wiley & Sons, Ltd. [source]


    Is trait-Emotional Intelligence simply or more than just a trait?

    EUROPEAN JOURNAL OF PERSONALITY, Issue 4 2004
    Karen van der Zee
    The present study examined the usefulness of trait-Emotional Intelligence (EI) among a sample of 1186 top managers who filled out questionnaires for Emotional Intelligence and the Big Five and were evaluated by a consultant on their competencies. Three higher-order factors were found to underlie the Bar-On Emotional Quotient Inventory (Bar-On, 1997): sense of accomplishment, empathy, and planfulness. Trait-EI was found to be substantially related to Extraversion, Agreeableness, Emotional Stability, and Autonomy. Nevertheless, the EI-factors predicted additional variance over and above the Big Five in competency to support. On the whole, top managers scored higher on the EI dimensions compared with a general population sample. High EI scores were particularly found among managers from enterprising occupational environments, that is environments dominated by activities that entail persuading and leading others to attain organizational goals or economic gain. Copyright © 2004 John Wiley & Sons, Ltd. [source]


    The police officer's terrorist dilemma: trust resilience following fatal errors

    EUROPEAN JOURNAL OF SOCIAL PSYCHOLOGY, Issue 6 2008
    Mathew P. White
    Suicide attacks have raised the stakes for officers deciding whether or not to shoot a suspect (,Police Officer's Terrorist Dilemma'). Despite high-profile errors we know little about how trust in the police is affected by their response to the terrorist threat. Building on a conceptualisation of lay observers as intuitive signal detection theorists, a general population sample (N,=,1153) were presented with scenarios manipulated in terms of suspect status (Armed/Unarmed), officer decision (Shoot/Not Shoot) and outcome severity (e.g. suspect armed with Bomb/Knife; police shoot suspect/suspect plus child bystander). Supporting predictions, people showed higher trust in officers who made correct decisions, reflecting good discrimination ability and who decided to shoot, reflecting an ,appropriate' response bias given the relative costs and benefits. This latter effect was moderated by (a) outcome severity, suggesting it did not simply reflect a preference for a particular type of action, and (b) preferences for a tough stance towards terrorism indexed by Right-Wing Authoritarianism (RWA). Despite loss of civilian life, failure to prevent minor terror attacks resulted in no loss of trust amongst people low in RWA, whereas among people high in RWA trust was positive when police erroneously shot an unarmed suspect. Relations to alternative definitions of trust and procedural justice research are discussed. Copyright © 2007 John Wiley & Sons, Ltd. [source]


    Subtle gene,environment interactions driving paranoia in daily life

    GENES, BRAIN AND BEHAVIOR, Issue 1 2009
    C. J. P. Simons
    It has been suggested that genes impact on the degree to which minor daily stressors cause variation in the intensity of subtle paranoid experiences. The objective of the present study was to test the hypothesis that catechol- O -methyltransferase (COMT) Val158Met and brain-derived neurotrophic factor (BDNF) Val66Met in part mediate genetic effects on paranoid reactivity to minor stressors. In a general population sample of 579 young adult female twins, on the one hand, appraisals of (1) event-related stress and (2) social stress and, on the other hand, feelings of paranoia in the flow of daily life were assessed using momentary assessment technology for five consecutive days. Multilevel regression analyses were used to examine moderation of daily life stress-induced paranoia by COMT Val158Met and BDNF Val66Met genotypes. Catechol- O -methyltransferase Val carriers displayed more feelings of paranoia in response to event stress compared with Met carriers. Brain-derived neurotrophic factor Met carriers showed more social-stress-induced paranoia than individuals with the Val/Val genotype. Thus, paranoia in the flow of daily life may be the result of gene,environment interactions that can be traced to different types of stress being moderated by different types of genetic variation. [source]


    Brief Communications: An Analysis of Migraine Triggers in a Clinic-Based Population

    HEADACHE, Issue 8 2010
    Diane Andress-Rothrock MS
    Background., Many migraineurs report attack "triggers," but relatively few published data exist regarding the relative prevalences of individual triggers, variations related to gender, duration of migraine or migraine subtype, or the existence of any regional variations in the prevalences and distributions of triggers. Objective., We sought to determine the prevalence and types of migraine triggers in our clinic population, to determine what influence gender, migraine subtype, or duration of migraine might have on the prevalences and types of triggers reported and to compare our findings with data derived from surveys we previously had conducted involving 2 clinic-based populations and 1 general population sample from other regions of the USA. Methods., We evaluated 200 consecutive new migraine patients referred to our clinic. All patients specifically were queried as to whether they had noted any of 7 specific factors to serve consistently as migraine attack triggers and additionally were surveyed as to whether they might have "other" triggers not listed on the intake questionnaire. Among the other data collected and analyzed were age, gender, age at time of migraine onset, and migraine subtype (ie, episodic vs chronic). Actively cycling females who reported menses as a trigger were questioned as to whether their menstrual migraine (MM) attacks differed from their non-menstrual migraines and, if so, how they differed. Results., One hundred and eighty-two patients (91%) reported at least 1 migraine trigger, and 165 (82.5%) reported multiple triggers. The most common trigger reported (59%) was "emotional stress," followed by "too much or little sleep" (53.5%), "odors" (46.5%), and "missing meals" (39%). Females or subjects of either gender with chronic migraine were no more likely than males or subjects with episodic migraine to report triggers or multiple triggers. Similarly, longer exposure to migraine did not correlate with a higher likelihood of reporting a trigger or multiple triggers. Fifty-three (62%) of 85 actively cycling females reported menses as a trigger, and of the 51 with menstrually related migraine, 34 (67%) reported their MM to be more severe, more refractory to symptomatic therapy or of longer duration than their non-menstrual attacks; 13 (24.5%) of the 53 women with apparent MM reported their MM to be at least occasionally manifested as status migrainosus. The prevalence and type of triggers reported by this predominantly white female population were similar to those reported by clinic-based populations in San Diego, California and Mobile, Alabama, and in a population-based sample of Hispanics in San Diego County. Conclusions., A large majority of migraineurs report migraine attack triggers, and the triggers most commonly reported include emotional stress, a disrupted sleep pattern, and various odors. These findings do not appear to vary according to geographic region or race/ethnicity. Among the triggers, MM appears inclined to provoke headache that is more severe, less amenable to treatment, or longer in duration than headaches that occur at other times during the cycle. (Headache 2010;50:1366-1370) [source]


    Contingent valuation in health care: does it matter how the ,good' is described?

    HEALTH ECONOMICS, Issue 5 2008
    Richard D. Smith
    Abstract A general population sample of 104 Australian respondents completed an interviewer-administered contingent valuation (CV) survey that asked them to value five scenarios representing the same core improvement in health status. These scenarios varied only in the degree of narrative used to describe the condition causing the health problem being valued and labeling of this health problem. Results indicate no significant difference in willingness to pay (WTP) between expressing symptoms as a brief or moderate narrative, but a significantly lower WTP value when expressed in an extensive narrative. WTP also differed significantly according to condition ,labels'. Possible implications for CV research are outlined. Copyright © 2007 John Wiley & Sons, Ltd. [source]


    It's not just what you do, it's the way that you do it: the effect of different payment card formats and survey administration on willingness to pay for health gain

    HEALTH ECONOMICS, Issue 3 2006
    Richard D. Smith
    Abstract A general population sample of 314 Australian respondents were randomly allocated to complete a contingent valuation survey administered by face-to-face or telephone (,phone-mail-phone') interview. Although the telephone interview was quicker to complete, no significant difference was found in values obtained through either method. Within each sub-sample, respondents were also randomly allocated to the three different versions of the payment card (PC) questionnaire format: values listed from high-to-low, values listed from low-to-high and values randomly shuffled. The high-to-low version resulted in significantly higher values than the other versions. Further analyses indicate that the randomly shuffled PC version may produce the most ,valid' values. Copyright © 2005 John Wiley & Sons, Ltd. [source]


    Involving users in low back pain research

    HEALTH EXPECTATIONS, Issue 4 2003
    Bie Nio Ong BA BEd MA PhD
    Abstract Objective, To involve users in the design of a research project that aims at describing a 12-month course of low back pain in an adult population sample (epidemiological strand), and to determine how patient and professional perceptions of low back pain and its treatment relate to the use of health-care and to subsequent outcome (qualitative strand). Design, Three focus groups were organized in the preparatory phase of the project with general practitioners, other health professionals and low back pain sufferers. Issues pertaining to the experience of living with, or treating low back pain were explored and users were asked to identify relevant research questions for consideration within the study. Findings, The focus groups revealed tensions between involving users as co-researchers for design issues and their role as sufferers and health professionals who want to share their narrative accounts of low back pain. The group discussions produced a wealth of material for analysis, but no explicitly stated research topics. Three key themes and the process of user involvement in the focus groups are discussed. Conclusions, The focus group format could be restrictive in that it allows for detailed exchange between participants, but is insufficiently geared towards the production of a research agenda. We draw conclusions as to possible approaches for user involvement in health services research design. [source]


    Antimicrobial Susceptibility of Helicobacter pylori Strains in a Random Adult Swedish Population

    HELICOBACTER, Issue 4 2006
    Tom Storskrubb
    Abstract Background and Aim:, Antimicrobial resistance in Helicobacter pylori is a growing problem and has become an important factor leading to eradication failure. Information on antimicrobial susceptibility is important for selection of an optimum treatment regimen. The resistance rate in a random population has not been studied previously. Methods:, A random Swedish population sample (n = 3000, age 20,81 years) was surveyed using a mailed validated questionnaire assessing gastrointestinal symptoms (response rate of 74%). One-third of the responders was invited, in random order, and accepted an esophagogastroduodenoscopy with biopsies for H. pylori culture and histology. Subjects were not treated for their H. pylori infection but a minimum inhibitory concentration of metronidazole, clarithromycin, amoxicillin, and tetracycline for the H. pylori isolates (n = 333) was determined by agar dilution. Prescribed antibiotic in the area was recorded. Results:, Irrespective of symptomatology, 16.2% of the isolated H. pylori strains were resistant to metronidazole, 1.5% to clarithromycin, 0% to amoxicillin, and 0.3% to tetracycline. The antibiotic consumption was low from an international perspective. Conclusion:, The resistance to the antibiotics was lower than expected from patient sample studies, especially for clarithromycin, most probably due to a restrictive prescription policy in the area. Introduction of a test-and-treat strategy in Sweden would only marginally affect the usage of clarithromycin. [source]