W Zhao1, Y Chen, M Lin, R J Sigal. 1. Department of Epidemiology and Community Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON, Canada, K1 H 8M5. hzhao@cihi.ca
Abstract
OBJECTIVE: To examine the association between diabetes and the prevalence of depression in different sex and age groups by analysing the cross-sectional data from the National Population Health Survey, conducted in Canada in 1996-1997. STUDY DESIGN: A total of 53072 people aged 20-64 years were included in the analysis. Depression was defined as depression scale 5, based on the Composite International Diagnostic Interview Short-Form (CIDI-SF). Respondents who answered the following question affirmatively were considered to have diabetes: 'do you have diabetes diagnosed by a health professional?'. METHODS: A multiple logistic regression model was used to adjust for potential confounding effects, and a bootstrap procedure was used to take sampling weights and design effects into account. RESULTS: The prevalence of diabetes was much higher in people aged 40-64 years than in people aged 20-39 years (men: 4.7% vs. 0.5%; women: 3.5% vs. 0.8%, respectively). In contrast, people aged 20-39 years had a slightly higher prevalence of depression than those aged 40-64 years (men: 3.1% vs. 2.9%; women: 6.6% vs. 5.4%, respectively). Diabetes was significantly associated with depression in women aged 20-39 years (odds ratio [OR]=2.52, 95% confidence interval [CI]=1.19, 5.32), but not in women aged 40-64 years (OR=1.62, and 95% CI=0.65, 4.06). The association was not significant in both age groups in men, but it tended to be stronger in the younger age group. CONCLUSIONS: The data suggest that diabetes is significantly associated with depression, particularly in young adults.
OBJECTIVE: To examine the association between diabetes and the prevalence of depression in different sex and age groups by analysing the cross-sectional data from the National Population Health Survey, conducted in Canada in 1996-1997. STUDY DESIGN: A total of 53072 people aged 20-64 years were included in the analysis. Depression was defined as depression scale 5, based on the Composite International Diagnostic Interview Short-Form (CIDI-SF). Respondents who answered the following question affirmatively were considered to have diabetes: 'do you have diabetes diagnosed by a health professional?'. METHODS: A multiple logistic regression model was used to adjust for potential confounding effects, and a bootstrap procedure was used to take sampling weights and design effects into account. RESULTS: The prevalence of diabetes was much higher in people aged 40-64 years than in people aged 20-39 years (men: 4.7% vs. 0.5%; women: 3.5% vs. 0.8%, respectively). In contrast, people aged 20-39 years had a slightly higher prevalence of depression than those aged 40-64 years (men: 3.1% vs. 2.9%; women: 6.6% vs. 5.4%, respectively). Diabetes was significantly associated with depression in women aged 20-39 years (odds ratio [OR]=2.52, 95% confidence interval [CI]=1.19, 5.32), but not in women aged 40-64 years (OR=1.62, and 95% CI=0.65, 4.06). The association was not significant in both age groups in men, but it tended to be stronger in the younger age group. CONCLUSIONS: The data suggest that diabetes is significantly associated with depression, particularly in young adults.
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