Table 1 Demographic, medical factors, sleep duration and visual impairment in the National Health Interview Survey
(%) | Total N = 29815 | Black n = 4407 | White N = 25408 | P |
|---|---|---|---|---|
Age, years | 48 ± 18 | 46 ± 17 | 48 ± 18 | <0.001 |
Female sex | 56% | 61% | 55% | <0.001 |
Income, <35,000 | 77% | 84% | 76% | <0.001 |
BMI (mean ± SD) | 27 ± 6 | 29 ± 7 | 27 ± 6 | <0.001 |
Diabetes | 8% | 12% | 8% | <0.001 |
Hypertension | 28% | 36% | 27% | <0.001 |
Heart disease | 8% | 6% | 9% | <0.001 |
Depressive symptoms | 26% | 29% | 26% | <0.001 |
Visual impairment | 10% | 11% | 10% | <0.01 |
Short sleep | 49% | 59% | 48% | <0.001 |
Long sleep | 23% | 31% | 22% | <0.001 |