Table 1.
Demographic data and sleep study characteristics of the study population
| Patients | n=609, n (%) |
|---|---|
| Age (years), mean (SD) | 49 (4) |
| BMI (kg/m2), mean (SD) | 38.06 (21.01) |
| Male sex | 353 (58.0) |
| DM | 249 (40.9) |
| COPD | 243 (39.9) |
| Asthma | 220 (36.1) |
| HTN | 164 (26.9) |
| IHD | 276 (45.3) |
| Hypothyroid | 249 (40.9) |
| Type of study | |
| PSG | 565 (92.8) |
| Split night | 44 (7.2) |
| Epworth Sleepiness Scale, mean (SD) | 11.40 (5.78) |
| TST minutes, mean (SD) | 267.73 (70.64) |
| Sleep efficiency, mean (SD) | 73.38 (14.96) |
| Sleep onset minutes, mean (SD) | 23.53 (34.37) |
| Wake after sleep onset minutes, mean (SD) | 76.88 (49.72) |
| Stage n1 proportion, mean (SD) | 12.04 (10.02) |
| Stage n2 proportion, mean (SD) | 51.77 (20.27) |
| Stage n3 proportion, mean (SD) | 22.59 (18.56) |
| REM minutes, mean (SD) | 40.85 (23.44) |
| REM proportion, mean (SD) | 15.05 (7.85) |
| AHI, mean (SD) | 30.35 (28.74) |
| AHI in REM, mean (SD) | 59.81 (45.89) |
| AHI in NREM, mean (SD) | 34.82 (38.93) |
| Mean oxygen saturation during the study, mean (SD) | 93.27 (4.12) |
| Minimal oxygen saturation during the study, mean (SD) | 79.50 (10.57) |
| Period the oxygen saturation during the study was <90% (min), mean (SD) | 17.69 (28.15) |
BMI=Body mass index, SD=Standard deviation, DM=Diabetes mellitus, COPD=Chronic obstructive lung disease, HTN=Hypertension, IHD=Ischemic heart disease, TST=Total sleep time, REM=Rapid eye movement, PSG=Polysomnography