Table. Characteristics of the Prevalent and Incident Cohorts and Hospitalizations During Follow-up.
| Characteristic | Cohort, No. (%) | |
|---|---|---|
| Prevalent (n = 62 250) | Incident (n = 8719) | |
| Age at baseline, y | ||
| ≤24 | 5368 (8.6) | 1844 (21.2) |
| 25-34 | 10 748 (17.3) | 2297 (26.3) |
| 35-44 | 13 996 (22.5) | 1417(16.3) |
| 45-54 | 13 767 (22.1) | 1266 (14.5) |
| 55-64 | 8833 (14.2) | 763 (8.8) |
| ≥65 | 9538 (15.3) | 1132 (13.0) |
| Median age (IQR), y | 45.6 (34.6-57.9) | 36.2 (26.2-52.3) |
| Men | 31 257 (50.2) | 4898 (56.2) |
| No. of all-cause hospitalizations | ||
| 0 | 8617 (13.8) | 1748 (20.0) |
| 1 | 7948 (12.8) | 1443 (16.6) |
| 2-4 | 17 194 (27.6) | 2603 (29.9) |
| 5-8 | 12 423 (20.0) | 1520 (17.4) |
| ≥9 | 16 068 (25.8) | 1405 (16.1) |
| No. of all-cause hospitalizations per person, median (IQR) | 4 (1-9) | 3 (1-6) |
| No. of psychiatric hospitalizations | ||
| 0 | 25 619 (41.2) | 3674 (42.1) |
| 1 | 10 233 (16.4) | 1615 (18.5) |
| 2-4 | 13 490 (21.7) | 1980 (22.7) |
| 5-8 | 6273 (10.1) | 805 (9.2) |
| ≥9 | 6635 (10.7) | 645 (7.4) |
| No. of psychiatric hospitalizations per person, median (IQR) | 1 (0-4) | 1 (0-3) |
| Follow-up time, median (IQR), y | 14.1 (6.9-20.0) | 10.1 (5.0-14.3) |
Abbreviation: IQR, interquartile range.