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
1Body mass index.