Late-life depressive symptoms: an international study
Authors: Jogerst, Gerald J; Zheng, Shimin; Frolova, Elena V; Kim, Mee Young
Source: Family Practice, Volume 29, Number 4, 16 August 2011 , pp. 407-415(9)
Publisher: Oxford University Press
Abstract:Objectives. Evaluate differences in depressive symptoms, compare sociodemographic and health-related variables associated with depressive symptoms and report level of impact of depressive symptoms on daily activities.
Methods. Cross-sectional study using a self-administered questionnaire and Patient Health Questionnaire-9 (PHQ-9) diagnostic survey on 1115 patients aged 6093 years who attended a primary care clinic in Korea, Russia or USA.
Results. At least mild depression (PHQ-9 score of 5) occurred in 28% of Koreans, 65% of Russian and 27% of US participants. Russians scored more depressed on all PHQ-9 items (P < 0.01) and more suicidal thoughts (P < 0.001), while Koreans had less feelings of worthlessness (P < 0.001). Depression predictors included poorer self-rated health [odds ratio (OR) 2.47, 95% confidence interval (CI) 1.843.33, P < 0.0001], chronic diseases (OR 1.34, CI 1.211.48, P < 0.0001), female gender (OR 1.56, CI 1.152.12, P 0.0046) and religious attendance (OR 0.88, CI 0.790.97, P 0.0099) for all subjects. Being employed was protective in Korea (OR 0.41, CI 0.210.77, P 0.0061) and being married (OR 0.42, CI 0.270.66, P 0.0002) and of older age (OR 0.95, CI 0.930.98, P 0.0006) protective in US participants. Vascular disease was associated with depressive symptoms in Russia (OR 3.47, CI 1.239.80, P 0.0187). In regression analyses stratified by country for a given level of depressive symptoms, the Russian sample had less impact on daily activities (Russia R 2 0.107 versus Korea R 2 0.211 and US R 2 0.419) P 0.029.
Conclusions. Depressive symptoms were more common in Russia than in Korea and USA but had less impact on daily functioning. Cultural or environmental factors may account for this finding.
Document Type: Research Article
Publication date: 2011-08-16
- Family Practice is an international journal aimed at practitioners, teachers and researchers in the fields of family medicine, general practice and primary care in both developed and developing countries.