Psychological health--depression.
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D002170:Canada / Q000453:epidemiology; D002648:Child; D003430:Cross-Sectional Studies; D003863:Depression / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control / Q000523:psychology*; D005260:Female; D005544:Forecasting; D006304:Health Status; D006801:Humans; D015994:Incidence; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D011159:Population Surveillance; D011237:Predictive Value of Tests; D015995:Prevalence; D012307:Risk Factors; D017678:Sex Distribution; D012907:Smoking / Q000009:adverse effects; D012944:Social Support