Table 4.
General characteristics of patients classified according to POSA Definition 2
| Patient characteristics | All patients (n = 624) | Non-POSA (n = 383, 61.4%) | POSA (n = 241, 38.6%) | p value |
|---|---|---|---|---|
| Age (years), mean (SD) | 50.2 (13.7) | 49.8 (14) | 51 (13.1) | 0.934 |
| Male sex, n (%) | 325 (52.08) | 183 (47.8) | 142 (58.9) | 0.007* |
| BMI (kg/m2), mean (SD) | 36.6 (9.6) | 34.9 (8.3) | 37.7 (7.95) | < 0.001* |
| DM, n (%) | 205 (32.85) | 138 (43.4) | 67 (35.8) | 0.945 |
| COPD, n (%) | 230 (36.8) | 142 (44.5) | 88 (47.3) | 0.543 |
| Asthma, n (%) | 244 (39.1) | 155 (47.8) | 89 (46.6) | 0.785 |
| HTN, n (%) | 308 (49.4) | 131 (40.8) | 79 (40.1) | 0.873 |
| IHD, n (%) | 259 (41.5) | 157 (48.8) | 102 (52) | 0.496 |
| Epworth Sleepiness Scale score, mean (SD) | 11.1 (5.6) | 10.5 (5.7) | 11.9 (5.3) | 0.026* |
| AHI, mean (SD) | 22.2 (17) | 15.9 (13.2) | 32.6 (17.5) | < 0.001* |
| AHI in REM sleep, mean (SD) | 36.5 (21.5) | 29.5 (19.6) | 48.1 (19.5) | < 0.001* |
| AHI in the supine position, mean (SD) | 25.4 (20.8) | 16.5 (15) | 40.3 (20.6) | < 0.001* |
| Mean O2 saturation, mean (SD) | 94.7 (2.3) | 94.9 (2.29) | 94.5 (2.22) | 0.168 |
| Time spent < 90% O2 saturation, mean (SD) | 7 (14.3) | 5.8 (13.3) | 8.9 (15.6) | 0.012* |
*p value of <0.05 is considered to be significant