Surgical hand trauma matched cohort baseline characteristics (index dates between Apr. 1, 2006, and Mar. 31, 2014)
| Variable | No. (%)* of control patients n = 104 353 | No. (%)* of case patients n = 26 123 | Standardized difference | p value |
|---|---|---|---|---|
| Male | 67 095 (64.3) | 16 799 (64.3) | 0 | 0.973 |
| Mental health utilization in year before index | 19 126 (18.3) | 4803 (18.4) | 0 | 0.829 |
| Age, yr | ||||
| Mean ± SD | 41.83 ± 13.62 | 41.83 ± 13.62 | 0 | 0.981 |
| Median (IQR) | 43 (30–53) | 43 (30–53) | 0 | 0.98 |
| Age group, yr | ||||
| 17–19 | 4700 (4.5) | 1176 (4.5) | 0 | 1 |
| 20–24 | 10 876 (10.4) | 2720 (10.4) | 0 | |
| 25–29 | 9648 (9.2) | 2419 (9.3) | 0 | |
| 30–34 | 9263 (8.9) | 2321 (8.9) | 0 | |
| 35–39 | 9611 (9.2) | 2408 (9.2) | 0 | |
| 40–44 | 11 691 (11.2) | 2928 (11.2) | 0 | |
| 45–49 | 12 981 (12.4) | 3246 (12.4) | 0 | |
| 50–54 | 12 571 (12.0) | 3145 (12.0) | 0 | |
| 55–59 | 11 859 (11.4) | 2968 (11.4) | 0 | |
| 60–66 | 11 153 (10.7) | 2792 (10.7) | 0 | |
| Income quintile | ||||
| 1 | 21 537 (20.6) | 5316 (20.3) | 0.01 | 0.839 |
| 2 | 20 990 (20.1) | 5252 (20.1) | 0 | |
| 3 | 21 079 (20.2) | 5247 (20.1) | 0 | |
| 4 | 20 494 (19.6) | 5180 (19.8) | 0 | |
| 5 | 19 674 (18.9) | 4987 (19.1) | 0.01 | |
| Missing | 579 (0.6) | 141 (0.5) | 0 | |
| ACG group | ||||
| 0–5 | 88 449 (84.8) | 22 064 (84.5) | 0.01 | 0.24 |
| 6–9 | 13 646 (13.1) | 3453 (13.2) | 0 | |
| 10+ | 2258 (2.2) | 606 (2.3) | 0.01 | |
| LHIN | ||||
| 1 | 5630 (5.4) | 1383 (5.3) | 0 | 0.411 |
| 2 | 10 091 (9.7) | 2445 (9.4) | 0.01 | |
| 3 | 5449 (5.2) | 1393 (5.3) | 0 | |
| 4 | 12 741 (12.2) | 3130 (12.0) | 0.01 | |
| 5 | 5948 (5.7) | 1470 (5.6) | 0 | |
| 6 | 7372 (7.1) | 1851 (7.1) | 0 | |
| 7 | 8992 (8.6) | 2168 (8.3) | 0.01 | |
| 8 | 9488 (9.1) | 2453 (9.4) | 0.01 | |
| 9 | 12 536 (12.0) | 3116 (11.9) | 0 | |
| 10 | 4956 (4.7) | 1268 (4.9) | 0 | |
| 11 | 7605 (7.3) | 1975 (7.6) | 0.01 | |
| 12 | 4041 (3.9) | 1042 (4.0) | 0.01 | |
| 13 | 6836 (6.6) | 1773 (6.8) | 0.01 | |
| 14 | 2630 (2.5) | 644 (2.5) | 0 | |
| 99 | 38 (0) | 12 (0) | 0 | |
| RIO2008 group | ||||
| Major urban | 69 160 (66.3) | 17 099 (65.5) | 0.02 | 0.033 |
| Missing | 1445 (1.4) | 396 (1.5) | 0.01 | |
| Rural | 9797 (9.4) | 2552 (9.8) | 0.01 | |
| Urban | 23 951 (23.0) | 6076 (23.3) | 0.01 | |
| ONMARG summary score | ||||
| 2.00 | 7349 (7.0) | 1824 (7.0) | 0 | 0.043 |
| 3.00 | 11 991 (11.5) | 2945 (11.3) | 0.01 | |
| 4.00 | 7784 (7.5) | 1935 (7.4) | 0 | |
| 5.00 | 316 (0.3) | 82 (0.3) | 0 | |
| 9.00 | 1265 (1.2) | 339 (1.3) | 0.01 | |
| 1.50 | 1470 (1.4) | 404 (1.5) | 0.01 | |
| 2.50 | 10 968 (10.5) | 2675 (10.2) | 0.01 | |
| 3.50 | 9885 (9.5) | 2456 (9.4) | 0 | |
| 4.50 | 2349 (2.3) | 619 (2.4) | 0.01 | |
| 1.25 | 130 (0.1) | 34 (0.1) | 0 | |
| 1.75 | 4253 (4.1) | 1083 (4.1) | 0 | |
| 2.25 | 9856 (9.4) | 2441 (9.3) | 0 | |
| 2.75 | 12 241 (11.7) | 3207 (12.3) | 0.02 | |
| 3.25 | 10 226 (9.8) | 2680 (10.3) | 0.02 | |
| 3.75 | 8852 (8.5) | 2065 (7.9) | 0.02 | |
| 4.25 | 4387 (4.2) | 1080 (4.1) | 0 | |
| 4.75 | 1031 (1.0) | 254 (1.0) | 0 | |
Note: ACG = adjusted clinical groups, IQR = interquartile range, LHIN = Local Health Integration Network, ONMARG = Ontario Marginalization Index, RIO = Rurality Index of Ontario, SD = standard deviation.
↵* Unless otherwise specified.