Table 2.
General characteristics of patients classified according to POSA Definition 1
| Patient characteristics | All patients (n = 624) | Non-POSA* (n = 287, 46%) | POSA** (n = 337, 54%) | p value |
|---|---|---|---|---|
| Age (years), mean (SD) | 50.2 (13.7) | 51.3 (13.9) | 49.3 (13.5) | 0.28 |
| Male sex, n (%) | 325 (52.08) | 137 (47.7) | 188 (55.8) | 0.045* |
| BMI (kg/m2), mean (SD) | 36.6 (9.6) | 38.1 (8.5) | 34.2 (7.7) | < 0.001* |
| DM, n (%) | 205 (32.85) | 83 (36.8) | 123 (43.6) | 0.12 |
| COPD, n (%) | 230 (36.8) | 105 (47.3) | 125 (44.2) | 0.484 |
| Asthma, n (%) | 244 (39.1) | 108 (47.6) | 136 (47.2) | 0.936 |
| HTN, n (%) | 308 (49.4) | 87 (36.2) | 123 (44.2) | 0.0646 |
| IHD, n (%) | 259 (41.5) | 124 (52.3) | 135 (48) | 0.332 |
| Epworth Sleepiness Scale score, mean (SD) | 11.1 (5.6) | 11.7 (5.8) | 10.8 (6.1) | 0.211 |
| AHI, mean (SD) | 22.2 (17) | 25.5 (19.2) | 19.5 (14.4) | < 0.001* |
| AHI in REM sleep, mean (SD) | 36.5 (21.5) | 40.7 (22) | 33 (20.5) | < 0.001* |
| AHI in the supine position, mean (SD) | 25.4 (20.8) | 22.5 (22.8) | 27.7 (18.9) | < 0.001* |
| Mean O2 saturation, mean (SD) | 94.7 (2.3) | 94.4 (2.4) | 95 (2.2) | 0.061 |
| Time spent < 90% O2 saturation, mean (SD) | 7 (14.3) | 8.7 (16) | 5.6 (12.5) | 0.009* |
*p value of <0.05 is considered to be significant