Table 3: Demographic, anthropometric, and clinical characteristics based on occurrence of supine sleep.
| Variable | Supine sleep absent N = 13 (5.3%) | Supine sleep present N = 230 (94.6%) | p value |
| Age (years) | 55.4 ± 12.7 | 48.4 ± 13.1 | 0.063 |
| Male gender [n (%)] | 7 (54) | 127 (55) | 0.923 |
| Race [n (%)] | |||
| Caucasian | 7 (54) | 121 (53) | 0.947 |
| African-American | 6 (46) | 86 (37) | |
| Others | 0 (0) | 23 (10) | |
| BMI1 (kg/m2) | 38.2 ± 9.1 | 35.2 ± 8.1 | 0.202 |
| Neck circumference (inches) | 15.8 ± 1.8 | 16.2 ± 1.8 | 0.509 |
| Snoring [n (%)] | 11 (85) | 176 (76) | 0.5 |
| Epworth sleepiness scale score | 10.5 ± 5.0 | 10.7 ± 5.2 | 0.887 |
| Fatigue severity scale score | 42.9 ± 18.0 | 42.9 ± 18.0 | 0.29 |