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Rural Sample (rural + sample)

Distribution by Scientific Domains

Medical Sciences	80%

Selected Abstracts

Periodontal microbiota and clinical periodontal status in a rural sample in southern Thailand

EUROPEAN JOURNAL OF ORAL SCIENCES, Issue 5 2002
P. N. Papapanou
We sought to determine (i) the association of subgingival bacterial profiles to clinical periodontal status in a population with limited access to dental care in Thailand, and (ii) the external validity of our earlier findings from a similar study in rural China. We examined 356 subjects, 30,39 yr old and 50,59 yr old, with respect to clinical periodontal status and subgingival plaque at maximally 14 sites per subject. Checkerboard hybridizations were used to analyse a total of 4343 samples. The prevalence of the 27 species investigated ranged between 87.2% and 100%. Discriminant analysis based on microbial profiles classified correctly 67.5% of all deep (, 5 mm) and 64.2% of all shallow sites, and 67.4% of all subjects with and 69.3% of all subjects without , 3 deep pockets. High colonization by ,red complex' bacteria was four times as likely (95% Confidence Limits (CL) 2.5,6.6) in subjects with ,,10 sites with attachment loss of ,,5 mm, and 4.3 times as likely (95% CL 2.6,7.1) in subjects with , 30 such sites. The data confirmed (i) the ubiquitous prevalence of the bacteria investigated in subjects with no regular access to dental care; and (ii) the high odds for periodontal pathology conferred by increased levels of specific periodontal bacteria. [source]

Prevalence and correlates of late-life depression compared between urban and rural populations in Korea

INTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY, Issue 5 2002
Jae-Min Kim
Abstract Background The aetiology of late-life depression has received relatively little research in developing countries. Urban and rural populations have rarely been sampled in the same study. Objectives To investigate demographic factors associated with depression and depressive symptoms in an urban and rural sample of older Korean people. Methods A community survey of residents aged 65 or over was conducted in an urban and a rural area within Kwangju, South Korea. The Korean Form of the Geriatric Depression Scale (KGDS) was administered. Associations with demographic, socio-economic factors and cognitive function (MMSE) were investigated for depression categorised according to a previously validated cut-off. Results The sample comprised 485 urban-dwelling and 649 rural-dwelling participants. No difference was found between urban and rural samples for prevalence rates of depression. However associations with independent variables varied between the areas. In the urban sample, increased age, low education, manual occupation and current rented accommodation were independently associated with depression. Only low education was associated with depression in the rural sample. The interaction with sample area was strongest for age (p,<,0.01) and persisted after further adjustment for cognitive function. Conclusions Adverse socio-economic status was strongly associated with depression and appeared to operate across the life-course. While no evidence was found for urban,rural differences in prevalence rates of depression, factors associated with depression differed between these populations. Copyright © 2002 John Wiley & Sons, Ltd. [source]

Relationship Between Post-traumatic Stress Disorder and Pain in Two American Indian Tribes

PAIN MEDICINE, Issue 1 2005
Dedra Buchwald MD
ABSTRACT Objectives., To estimate the association of lifetime post-traumatic stress disorder (PTSD) and pain in American Indians, and determine if tribe, sex, cultural and psychosocial factors, or major depression influence the magnitude of this association. Design., A cross-sectional probability sample survey completed between 1997 and 2000. A structured interview was conducted by trained, tribal members to gather information on demographic and cultural features, physical health status, psychiatric disorders, and functional status. Setting., General community. Participants., A total of 3,084 individuals randomly selected from the tribal rolls of a Southwestern (N = 1,446) and a Northern Plains (N = 1,638) tribal group who were 15,54 years of age and lived on or within 20 miles of their reservations. Outcome Measures., Bodily pain subscale of the Short Form-36. Linear regression models were fit to examine the association between lifetime PTSD and pain, adjusting for demographic, cultural, psychosocial features, painful medical conditions, and major depression. Results., The prevalence of lifetime PTSD was 16% in the Southwestern and 14% in the Northern Plains; women were nearly twice as likely as men to have lifetime PTSD in both tribes. The final adjusted model demonstrated that mean Short Form-36 bodily pain subscale scores were lower (indicating more pain) among individuals with lifetime PTSD than those without lifetime PTSD. Effect modification by tribe, sex, and depression was not observed. Conclusions., Lifetime PTSD was strongly associated with bodily pain in this rural sample of American Indians. Clinicians should be aware of, and address, the link between physical pain syndromes and PTSD. [source]

Prevalence and correlates of late-life depression compared between urban and rural populations in Korea

Pyrethroid resistance/susceptibility and differential urban/rural distribution of Anopheles arabiensis and An. gambiae s.s. malaria vectors in Nigeria and Ghana

MEDICAL AND VETERINARY ENTOMOLOGY, Issue 3 2003
M. Kristan
Abstract., Resistance to pyrethroid insecticides and DDT caused by the kdr gene in the malaria vector Anopheles gambiae Giles s.s. (Diptera: Culicidae) has been reported in several West African countries. To test for pyrethroid resistance in two more countries, we sampled populations of the An. gambiae complex from south-western Ghana and from urban and rural localities in Ogun State, south-west Nigeria. Adult mosquitoes, reared from field-collected larvae, were exposed to the WHO-recommended discriminating dosage of exposure for 1 h to DDT 4%, deltamethrin 0.05% or permethrin 0.75% and mortality was recorded 24 h post-exposure. Susceptibility of An. gambiae s.l. to DDT was 94,100% in Ghana and 72,100% in Nigeria, indicating low levels of DDT resistance. Deltamethrin gave the highest mortality rates: 97,100% in Ghana, 95,100% in Nigeria. Ghanaian samples of An. gambiae s.l. were fully susceptible to permethrin, whereas some resistance to permethrin was detected at 4/5 Nigerian localities (percentage mortalities 75, 82, 88, 90 and 100%), with survivors including both An. arabiensis Patton and An. gambiae s.s. identified by PCR assay. Even so, the mean knockdown time was not significantly different from a susceptible reference strain, indicating absence or low frequency of kdr -type resistance. Such low levels of pyrethroid resistance are unlikely to impair the effectiveness of pyrethroid-impregnated bednets against malaria transmission. Among Nigerian samples of An. gambiae s.l., the majority from two urban localities were identified as An. arabiensis, whereas the majority from rural localities were An. gambiae s.s. These findings are consistent with those of M. Coluzzi et al. (1979). Differences of ecological distribution between molecular forms of An. gambiae s.s. were also found, with rural samples almost exclusively of the S-form, whereas the M-form predominated in urban samples. It is suggested that ,urban island' populations of An. arabiensis and of An. gambiae s.s. M-form in the rainforest belt of West Africa might be appropriate targets for elimination of these malaria vectors by the sterile insect technique. [source]