Table 1.

Study variables

Instrument	Assessment area	Applied by	Time(s) of assessments
Sampling form	Age, sex, inclusion/exclusion criteria	Primary care physicians	Baseline
Sociodemographic data form	Age, sex, marital status, educational level, labour status, social class	Research interviewer by means of telephonic interview	Baseline
Duke Severity of Illness Checklist (DUSOI)	Global severity of physical comorbidity	Primary care physicians	Baseline
PRIME-MD; dysthymia and anxiety modules	Common psychiatric comorbidity	Primary care physicians	Baseline
Patient Health Questionnaire (PHQ-9)	Severity of depressive symptoms, remission and response rates	Research interviewer by means of telephone interview	Baseline, 3, 6 and 12 months
Questionnaire	Length of evolution of current depressive episode and previous history of depression.	Research interviewer by means of telephone interview	Baseline
SF-12 Health Survey	Health-related quality of life: mental health and physical health scores	Research interviewer by means of telephone interview	Baseline, 3, 6 and 12 months
Morisky-Green Test	Treatment adherence	Research interviewer by means of telephone interview	Baseline, 3, 6 and 12 months
Use of health resources questionnaire	Number of primary care, psychiatric and emergency visits, and hospitalisations owing to mental health problems	Research interviewer by means of telephone interview	3, 6 and 12 months
Satisfaction with the care received	Satisfaction of the patient with the clinical care got for his depression	Research interviewer by means of telephone interview	3, 6 and 12 months
Exploration of the computer database of pharmaceutical prescription and invoicing	Treatment with antidepressants. Medical prescription and consumption by the patient.	Research assistant	3, 6 and 12 months