Table 2.: Demographics and clinical characteristics by ethnicity.

Caucasian African American Hispanic P-Value
Number 100 100 100
Age (years), mean ± s.d. 51.2 ± 9.5 48.5 ± 11.4 48.6 ± 10.4 n.s.
Height (m), mean ± s.d. 1.70 ± 0.11 1.71 ± 0.11 1.65 ± 0.08 < 0.0001*
Weight (kg), mean ± s.d. 128.9 ± 31.9 125.7 ± 31.6 112.9 ± 27.6 0.0005*
BMI (kg/m2), mean ± s.d. 44.7 ± 10.5 42.9 ± 9.7 41.6 ± 9.0 n.s.
ESS, mean ± s.d. 13.5 ± 5.1 13.8 ± 6.2 13.2 ± 6.2 n.s.
AHI (events/hour), mean ± s.d. 41.9 ± 36.6 43.0 ± 34.2 55.5 ± 41.2 0.028**
SpO2 nadir (%), mean ± s.d. 73.5 ± 13.5 72.9 ± 13.8 68.5 ± 17.5 n.s.
Bruxism, number (%) 35 (35%) 23 (23%) 19 (19%) 0.026**
GERD, number (%) 34 (34%) 40 (40%) 31 (31%) n.s.
Insomnia, number (%) 84 (84%) 82 (82%) 81 (81%) n.s.
RL symptoms, number (%) 34 (34%) 36 (36%) 38 (38%) n.s.

s.d. = standard deviation; m = meters; kg = kilograms; n.s. = not significant; BMI = body mass index; ESS =Epworth Sleepiness Scale score; AHI = apnea-hypopnea index; SpO2 = oxygen saturation; % = percentage; RL = restless legs. *Significant differences: Caucasian vs Hispanic, African American vs Hispanic. **Significant difference: Caucasian vs Hispanic.