Table 2 Characteristics of the study population according to severity of depression diagnosis, 2017
| Â | mild depression | moderate depression | severe depression | |||
|---|---|---|---|---|---|---|
cases | controls | cases | controls | cases | controls | |
Number of insurants | 1.685.113 | 6.740.452 | 3.213.925 | 12.855.700 | 1.404.250 | 5.617.000 |
Age (mean, SD) | 56.1 (18.8) | 56.1 (18.8) | 55.4 (17.8) | 54.3 (17.9) | 55.5 (17.2) | 55.4 (17.3) |
Women (%) | 67.4 | 67.4 | 67.8 | 67.8 | 65.3 | 65.3 |
Number of different doctors seen in 2017 (median, Q1, Q3) | 8 (5, 12) | 5 (3, 8) | 8 (5, 12) | 5 (3, 8) | 8 (5, 12) | 5 (2, 8) |
Number of diagnosis groups (%) | ||||||
 ≤ 10 diagnosis groups | 43 | 69 | 44 | 71 | 41 | 70 |
 11- ≤ 20 diagnosis groups | 41 | 26 | 40 | 24 | 41 | 25 |
 21+ diagnosis groups | 16 | 5 | 16 | 5 | 18 | 5 |
Number of treatment cases in 2017 (median, Q1, Q3) | 12 (8, 17) | 8 (4, 12) | 12 (8, 18) | 7 (4, 12) | 13 (9, 19) | 7 (4, 12) |
Total cost of ambulatory care (€) in 2017 (median, Q1, Q3)a | 724 (393, 1248) | 357 (155, 684) | 832 (448, 1484) | 340 (148, 652) | 892 (495, 1552) | 345 (150, 661) |