Table 3.

Prevalence of depression treatment among respondents 50-years and older in the U.S. Results are from the collaborative psychiatric epidemiology surveys.

	Depression treatmenta
	Major depressionb		Vascular depressionc		Tests of proportions
	%d	SEe	%d	SEe
Non-users	62.0	2.4	60.0	5.4	P = 0.742
Users	28.2	2.5	29.1	4.5	P = 0.865
Adequate users	9.9	1.2	11.0	2.8	P = 0.723
	Design-based F(1.87, 282.99) = 0.085; P = 0.908

^aDepression treatment is based on reports of use of either pharmacotherapy or psychotherapy. Distinction between users and adequate users is based on practice guidelines for the treatment of patients with major depressive disorder. Adequate users have at least 45 days of supervised, based on at least four visits to a professional in the past year, antidepressant drug use, or at least four visits to a mental health professional each lasting on 30-min on average.

^bMeeting criteria for lifetime major depression based on World Mental Health Composite International Diagnostic Interviews, with less than 2 reported cerebrovascular risk factors and no reported stroke.

^cMeeting criteria for lifetime major depression based on World Mental Health Composite International Diagnostic Interviews with 2 or more reported cerebrovascular risk factors or a report of a medical diagnosis of stroke and a depressive episode occurring after the age of 49-years.

^dWeighted prevalence rates.

^eSurvey design adjusted standard errors.