Home About us Contact
|
Home About us Contact | ||
|
|
||
Recall Bias (recall + bias)
Selected AbstractsEstimating angling effort and participation in a multi-user, inland fishery in South AfricaFISHERIES MANAGEMENT & ECOLOGY, Issue 1 2010B. R. ELLENDER Abstract, Angler counts, on-lake interviews and a household survey were used to estimate angler effort and participation in Lake Gariep, South Africa's largest inland water body. Annual fishing effort was estimated from instantaneous counts at 16392 angler day,1 yr,1. Recreational and subsistence anglers contributed 41 and 59% to the total annual fishing effort, respectively. Household surveys in lakeshore settlements estimated that ,914 anglers fished the lake and minimum daily fishing effort in one of the fishing areas assessed was 77 anglers. As a result of recall bias, these estimates were almost twice as high as those determined by direct counts. A low cost method of assessing participation by applying a mark,recapture model to the proportion of anglers whom had been previously interviewed during eight bimonthly sampling events was tested. The model converged in three of four applications (2 areas × 2 sectors). The mark,recapture method revealed similar numbers of anglers to the estimate of regular anglers (fishing 1,3 times a week) from the household survey and was considered an appropriate estimator for the number of subsistence anglers. Regardless of the assessment method the results show that the resource is of importance to subsistence livelihoods, which is an important management consideration in future fisheries development and rights allocation processes. [source] Self-reported use of mental health services versus administrative records: care to recall?INTERNATIONAL JOURNAL OF METHODS IN PSYCHIATRIC RESEARCH, Issue 3 2004Anne E. Rhodes Abstract Estimates of the level of unmet need for mental health treatment often rely on self-reported use of mental health services. However, depressed persons may over-report their use in relation to administrative records if they are highly distressed. This study seeks to replicate and explicate the finding that persons at a high level of distress report more mental health service use than recorded in their healthcare records. The study sample, N=36,892, 12 years and older, was drawn from the 1996/97 Ontario portion of the Canadian National Population Health Survey. Respondents were individually linked to their administrative mental healthcare records 12 months backward in time. Of these, 96.5% agreed to the link and 23,063 (62.5%) were linked. Almost two-thirds of those who were depressed in the past year were currently at a high level of distress. Differential reporting of use for highly distressed persons in excess of 100% remained in the use of different types of physician providers after adjustments for other potential determinants of use. Telescoping was also not an explanation. The patterns of differential reporting between groups expected to diverge and converge in their recall ability were consistent with a recall bias. As this study was not able to rule out a recall bias, it further accentuates concerns about the impact of bias in the measurement of mental health-service use and inferences made concerning the determinants of use. Copyright © 2004 Whurr Publishers Ltd. [source] Self-reported use of mental health services versus administrative records: should we care?INTERNATIONAL JOURNAL OF METHODS IN PSYCHIATRIC RESEARCH, Issue 3 2002Dr Anne E. Rhodes Abstract Studies of mental health services have emphasized that people in need are not receiving treatment. However, these studies, based on self-reported use, may not be consistent with administrative records. This study compared self-reports of mental health service use with administrative records in a large representative sample. Respondent reports within the Ontario portion of the 1994/95 Household Component of the National Population Health Survey (NPHS) were individually linked to the provincial mental-health physician reimbursement claims. A total of 5,187 Ontarians, aged 12 years or more, reported on their use of mental healthcare within the NPHS and 4,621 (89%) consented and were successfully linked to administrative records. Comparisons between the two sources identified that the agreement for any use and volume of use was moderate to low and varied according to select respondent characteristics. These differences affected estimates of the associations with use and volume of use. People who reported high levels of distress reported more visits than those who did not and this effect was stronger in the self-reported data. These results suggest that recall bias may be present. Regardless of the definition of care, access for those in need remains a concern despite universal medical insurance coverage. Copyright © 2002 Whurr Publishers Ltd. [source] Does prior psychological health influence recall of military experiences? a prospective studyJOURNAL OF TRAUMATIC STRESS, Issue 4 2008Jennifer Wilson In a prospective study, we evaluated pre- and postdeployment psychological health on recall of risk factors to assess recall bias. Measures of the General Health Questionnaire (GHQ), PTSD Checklist (PCL), and symptom clusters from the PCL were obtained from 681 UK military personnel along with information on traumatic and protective risk factors. Postdeployment psychological health was more important in explaining recall of traumatic experiences than predeployment psychological health. Predeployment intrusive cluster scores were highly associated with traumatic exposures. Postdeployment, but not predeployment GHQ showed small effects for most risk factors. With the exception of intrusive thoughts, there is insufficient evidence to suggest predeployment psychological status would be useful in correcting for recall bias in subsequent cross-sectional studies. [source] Real-Time Data Collection for Pain: Appraisal and Current StatusPAIN MEDICINE, Issue 2007Arthur A. Stone PhD ABSTRACT Objective., Real-time data capture (RTDC) techniques have rapidly developed with the advent of computer and information technology. We plan to discuss the use of RTDC in the assessment of pain, including issues pertaining to its rationale, sampling protocols, and our opinion on the current status of the methodology. Design., This is "thought" piece involving no systematic data collection methods. Results., We described the rationale for using RTDC, including issues in recall bias, the desire for detailed information about pain, and the ability to examine within,person associations between pain and other variables. The mechanics of RTDC implementations were discussed with a focus on sampling protocols and data collection methods. The final section concerned the status of RTDC. Current acceptance of RTDC is evaluated and three issues in the science of RTDC were discussed: the interpretation of differences between recall and the average of momentary assessments for the same period; if RTDC is advancing our understanding of pain; and, the issue of what consumers of pain assessments actually desire. RTDC extensions to feedback based on momentary assessments are also discussed. Conclusion., Real-time data collection can be a useful methodology for improving our understanding of pain and especially of its dynamic nature in real-world settings. [source] The use of nationwide on-line prescription records improves the drug history in hospitalized patientsBRITISH JOURNAL OF CLINICAL PHARMACOLOGY, Issue 2 2008Bente Glintborg What is already known about this subject ,,Structured medication interviews improve the medication history upon hospitalization ,,Pharmacy records are valid lists of the prescribed medications available to individual patients ,,In Denmark, treating doctors now have access to their patients' pharmacy records through a real-time online electronic database What this study adds ,,Omission errors are frequent among hospitalized patients despite structured drug interviews and home visits ,,Pharmacy records may be used to minimize patients' recall bias and improve the medication lists Background Structured medication interviews improve the medication history in hospitalized patients. In Denmark, a nationwide electronic version of individual pharmacy records (PR) has recently been introduced. Use of these records could improve the medication lists in hospitalized patients. Methods We prospectively included 500 patients admitted to an acute medical department. In individual patients, the PR was compared with (i) the medication list written in the patient chart and (ii) drug information provided by the patient during a structured drug interview upon admission and during a home visit after discharge. Results Median patient age was 72 years. Upon admission, patients reported using 1958 prescription-only medications (POM) (median four drugs per patient, range 0,14), of which 114 (6%) were not registered in PR. In PR, 1153 POM (median one per patient, range 0,11) were registered during the month preceding admission. The patients did not report 309 (27%) of these upon admission. Home visits were performed in a subgroup of 115 patients. During home visits, 18% of POM registered in PR during the preceding month were not reported. Drug type was predictive of reporting irrespective of patient sex or age. Cardiovascular drugs were reported most and dermatologicals were reported less frequently. Underreporting might be due to recall bias, non-adherence or discontinuation of drugs. Conclusions Omission errors are frequent despite structured medication interviews. Pharmacy records or medication lists from all treating doctors must be included in medication reviews in order to reduce recall bias. [source] Remembering childhood atopic dermatitis as an adult: factors that influence recollectionBRITISH JOURNAL OF DERMATOLOGY, Issue 3 2006C. Moberg Summary Background, Atopic dermatitis (AD) is common in the population, and studies have shown that the disease is on the increase. Studies based on hospital records reflect selected populations and may miss less severe cases of AD, and the use of self-reported questionnaires has the drawback of recall bias. Objectives, To investigate some possible factors influencing recall bias when questionnaires are used to establish the prevalence of childhood eczema in an adult population. Methods, A questionnaire regarding past and present eczema was sent to 557 cases (with signs suggesting the diagnosis AD) and 554 matched controls (subjects lacking signs of AD) born during 1960,1969 and identified in school health medical records. Cases and controls were aged 31,42 years at the time of the study and 70·5% returned the questionnaire. Results, Of 403 cases, 29% did not report childhood eczema in the questionnaire. There was a difference between those who did recall their childhood AD (remembering group, RG), and those who did not (forgetful group, FG) in who had documented the diagnostic signs in the school health records. In the RG the signs were reported by both parents and school health personnel in 51% of cases, and in the FG this was true of only 16%. The RG had a higher prevalence of eczema after 15 years of age and of hand eczema. The RG also reported more visits to physicians after the age of 15 years and more time taken as sick leave due to eczema. Conclusions, Several factors influence how well people remember their AD in childhood. These factors include disease activity in adult life, disease severity, and who noticed the eczema in childhood. [source] | ||||||||||