Table 5.
Demographic data and oxygenation parameters of patients across rapid eye movement-related obstructive sleep apnea definitions
| Patient characteristics | All patients (n=609), n (%) | Lenient (n=317; 52), n (%) | Intermediate (n=201; 33), n (%) | Strict (n=157; 26), n (%) | P |
|---|---|---|---|---|---|
| Age (years), mean (SD) | 48.99 (13.96) | 47.59 (13.48) | 47.23 (13.32) | 46.34 (12.51) | 0.625 |
| BMI (kg/m2), mean (SD) | 38.06 (21.01) | 38.14 (11.93) | 37.59 (10.83) | 37.07 (11.18) | 0.622 |
| Male sex | 353 (58.0) | 139 (43.8) | 77 (38.3) | 64 (40.8) | 0.45 |
| DM | 249 (40.9) | 140 (44.2) | 87 (43.3) | 68 (43.3) | 0.975 |
| COPD | 243 (39.9) | 131 (41.3) | 99 (49.3) | 81 (51.6) | 0.06 |
| Asthma | 220 (36.1) | 122 (38.5) | 92 (45.8) | 77 (49.0) | 0.061 |
| HTN | 164 (26.9) | 92 (29.0) | 55 (27.4) | 41 (26.1) | 0.788 |
| IHD | 276 (45.3) | 150 (47.3) | 109 (54.2) | 88 (56.1) | 0.128 |
| Hypothyroid | 222 (36.5) | 113 (35.6) | 79 (39.3) | 65 (41.4) | 0.436 |
| Epworth Sleepiness Scale, mean (SD) | 11.40 (5.78) | 10.62 (5.66) | 11.36 (5.78) | 11.57 (5.92) | 0.279 |
| Total AHI, mean (SD) | 30.35 (28.74) | 17.08 (12.08) | 12.98 (8.10) | 12.74 (6.97) | <0.001 |
| AHI in REM, mean (SD) | 59.81 (45.89) | 68.70 (48.67) | 50.19 (37.17) | 47.52 (32.39) | <0.001 |
| AHI in NREM, mean (SD) | 34.82 (38.93) | 16.62 (17.45) | 7.61 (3.85) | 7.18 (3.76) | <0.001 |
| AHI in supine, mean (SD) | 27.19 (37.07) | 16.19 (13.88) | 13.10 (12.15) | 13.05 (9.28) | 0.005 |
| Average oxygen saturation, mean (SD) | 93.27 (4.12) | 93.71 (4.04) | 94.10 (4.30) | 94.28 (4.51) | 0.339 |
| Minimum oxygen saturation, mean (SD) | 79.50 (10.57) | 81.76 (8.89) | 83.43 (8.23) | 83.72 (7.07) | 0.019 |
| Time spent <90% oxygen saturation, mean (SD) | 17.69 (28.15) | 15.32 (27.67) | 12.73 (26.59) | 9.81 (22.31) | 0.114 |
REM=Rapid eye movement, NREM=Non-REM, BMI=Body mass index, DM=Diabetes mellitus, COPD=Chronic obstructive lung disease, HTN=Hypertension, IHD=Ischemic heart disease, AHI=Apnea-hypopnea index, SD=Standard deviation