Table 2.

Primary outcome measures in the Diabetes-Depression Care-management Adoption Trial (DCAT), Los Angeles, 2011 to 2013. HBA_1c: glycated hemoglobin; PHQ-9: 9-item Patient Health Questionnaire; PST: problem-solving therapy; SF-12: 12-item Short Form Survey.

Variables		Description
Depression, measured at baseline and 6 months post intervention
	PHQ-9 [58]	Continuous variable assessing severity of depression. Scoring: PHQ-9 of 5-9=mild depression; PHQ-9 of 10-14=moderate depression; PHQ-9 of 15-19=major depression; PHQ-9 of 20-27=severe depression. For purposes of this study, PHQ-9 ≥10 indicated depression serious enough to consider pharmacologic or PST treatment.
	Depression remission	Dichotomous variable assessing effectiveness of treating patients with major depression. Depression remission defined as baseline PHQ-9 ≥10 and 6-month PHQ-9 ≤8 with a reduction ≥50%.
Diabetes, measured at baseline and 6 months post intervention if not otherwise indicated
	HBA1c valuea	Continuous variable assessing severity of diabetes. HBA1c value indicates average plasma glucose concentration over prolonged periods.
	HBA1c testeda	Dichotomous variable assessing diabetes care process.
	Total cholesterola	Continuous variable assessing cholesterol levels and severity of dyslipidemia
	Diabetes self-care [61]	Days per week of diabetes self-care. Treated as a continuous variable.
	Exercise	Days of participating in at least 30 min of exercise during previous week.
Patient reported outcomes, measured at baseline and 6 months post intervention
	SF-12 physical score [62]	Continuous variables assessing functional health and well-being
	SF-12 mental score [62]
	Sheehan Disability Scale [63,64]	Self-reported tool assessing functional impairment in work or school, social, and family life.
	Satisfaction with diabetes care	Five-level score assessing diabetes care satisfaction. Treated as a continuous variable.
	Satisfaction with care for emotional problems	Five-level score assessing mental health care satisfaction. Treated as a continuous variable.
	Satisfaction with care for emotional problems, baseline PHQ-9 ≥10	Five-level score assessing mental care satisfaction of patients with major depression. Treated as a continuous variable.

^aThe HBA_1c value, HBA_1c tested, and total cholesterol value were obtained from the LACDHS electronic medical record system. The measurement periods were within 3 months of baseline and 6-month post intervention. If more than one value was available, the values closest to the baseline and the 6-month follow-up period were chosen.