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Table 1 Cohort characteristics at each of the three data collection waves and characteristics of CIDI-SF respondents

From: Validation of case definitions of depression derived from administrative data against the CIDI-SF as reference standard: results from the PROspective Québec (PROQ) study

Characteristics T1
n = 9188
T2
n = 8120
T3
n = 6748
CIDI-SFa
n = 5515
Age 40.0 ± 8.6
(19–72)
47.8 ± 8.5
(26–80)
63.7 ± 7.6
(44–98)
64.0 ± 7.2
(44–89)
Sex
 Women 4581 (49.9%) 4000 (49.3%) 3357 (49.8%) 2674 (48.5%)
 Men 4607 (50.1%) 4120 (50.7%) 3391 (50.2%) 2841 (51.5%)
Education
  ≤ High school 2715 (29.8%) 2170 (27.0%) 1641 (24.6%) 1342 (24.4%)
 College 2564 (28.1%) 2233 (27.8%) 1787 (26.8%) 1454 (26.5%)
  ≥ University 3835 (42.1%) 3634 (45.2%) 3253 (48.7%) 2699 (49.1%)
Administrative cases of depressionb    255 (3.8%) 207 (3.8%)
  1. a CIDI-SF respondent are a subset of all participants in the T3 data collection wave. b At least one depression code (hospital or ambulatory) during the year preceding T3