Table 1. Racial Group Differences on Relevant Predictor and Outcome Variables.
| Measures |
Racial group category |
||
|---|---|---|---|
| Blacka (n=299) | White (n=1464) | Other (n=114) | |
| Age at enrollment, Mean (SD) | 44.08 (12.59) | 42.89 (13.55) | 37.27 (12.10)*** |
| Female (%) | 64 | 61 | 62 |
| Married (%) | 31 | 45*** | 36 |
| Years of schooling, mean (SD) | 12.89 (2.55) | 13.70 (3.36)*** | 14.06 (3.29)** |
| Employed (%) | 46 | 58*** | 53 |
| Private insurance (%) | 37 | 57*** | 43** |
| Cumulative Illness Severity index, mean (SD) | 1.41 (0.51) | 1.26 (0.58)*** | 1.16 (0.53)*** |
| Anxiety score, mean (SD) | 6.70 (2.55) | 6.10 (2.53)*** | 5.79 (2.47)** |
| Psychiatric comorbidity (%) | 64 | 52*** | 61 |
| Quality of life enjoyment and satisfaction questionnaire (QLESQ), mean (SD) | 40.66 (14.49) | 42.36 (15.22) | 43.62 (13.22) |
| Work and social adjustment scale (WSAS)b, mean (SD) | 24.65 (9.79) | 23.08 (9.06)* | 22.75 (8.73) |
| Perceived mental functioning (SF12), mean (SD) | 28.63 (9.48) | 26.69 (8.55)*** | 26.97 (8.94) |
| Length of time (days) in study, mean (SD) | 73.06 (30.76) | 75.46 (26.16) | 76.39 (26.50) |
| QIDS-C changec, median | 38 | 56*** | 53* |
| QIDS-SR change, median | 33 | 50*** | 50 |
| HRSD17 change, mean (SD) | 35 (0.42) | 43 (0.43)* | 42 (0.44) |
Ethnic group differences tested with one-way ANOVA, or χ2-test, two-tailed significance; ***p⩽0.001, **p⩽0.01, and *p⩽0.05.
Bonferroni correction for multiple pair-wise testing.
a
‘Black' is reference group.
b
Higher scores indicate lower perceived adjustment.
c
Average percent (%) improvement from baseline to exit on QIDS-C (median), QIDS-SR (median), and HRSD17 (mean).