Descriptive characteristics of cohorts
| Characteristic | PSP (n=293) No. (%) | GenPop (n=1198) No. (%) | Test statistic | P value |
| Age in years (mean± SD) | 40.9±10.8 | 41.1±11.1 | 0.23* | 0.82 |
| Sex | ||||
| Female | 61 (20.8) | 246 (20.5) | 0.012† | 0.91 |
| Male | 232 (79.2) | 952 (79.5) | ||
| Geographical region* | ||||
| Urban | 193 (65.9) | 745 (62.2) | 1.37† | 0.24 |
| Rural | 100 (34.1) | 453 (37.8) | ||
| Income† | ||||
| Low (Q1–Q2)‡ | 77 (26.3) | 431 (36.0) | 9.85† | 0.0017 |
| High (Q3–Q5) | 216 (73.7) | 767 (64.0) | ||
*Student’s t-test.
†χ2 test.
‡Low income (Q1–Q2) versus high income (Q3–Q5).
GenPop, general population; PSP, public safety personnel; Q, income quintiles (based on area-level income).