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Distribution of combined risk factor
| Risk factors | All subjects (n = 317) | Black (n = 135) |
White (n = 182) |
p-value versus all other risk factor levels* |
|---|---|---|---|---|
| Both | 51 (16.1%) | 31 (23.0%) | 20 (11.0%) | 0.004 |
| PSQI > 6 only | 69 (21.8%) | 34 (25.2%) | 35 (19.2%) | 0.20 |
| CES-D ≥ 16 only | 25 (7.9%) | 15 (11.1%) | 10 (5.5%) | 0.07 |
| Neither | 172 (54.3%) | 55 (40.7%) | 117 (64.3%) | <0.001 |
aOverall (omnibus) chi-square test for difference in risk factor level distribution by race: X2(3) = 19.2, p < 0.001.
