Table 3.
Comparisons of CPAP Metric by Race After 30 and 90 Days of Therapy
| CPAP Characteristic | 30 d |
90 d |
||||
|---|---|---|---|---|---|---|
| Black Participants (n = 30) | White Participants (n = 48) | P Value | Black Participants (n = 30) | White Participants (n = 48) | P Value | |
| Days used | 20.6 ± 6.7 | 26.4 ± 5.8 | < .001 | 48.8 ± 25.6 | 74.2 ± 23.7 | < .001 |
| Days ≥ 4 h, % | 44 ± 25 | 67 ± 32 | .002 | 36 ± 23 | 63 ± 28 | < .001 |
| Mean daily usage, h | 3.7 ± 1.8 | 5.6 ± 2.0 | < .001 | 3.0 ± 1.8 | 5.2 ± 2.3 | < .001 |
| Residual AHI | 3.3 ± 3.9 | 5.4 ± 4.5 | .036 | 4.3 ± 5.2 | 4.6 ± 3.6 | .781 |
| CPAP, cm H2O | 7.1 ± 2.9 | 6.7 ± 2.7 | .532 | 7.4 ± 3.1 | 6.9 ± 2.9 | .585 |
Data are presented as mean ± SD or as otherwise indicated. Boldface values represent P < .05. Group comparisons made per Student t test. AHI = apnea-hypopnea index (events/h of sleep).