Table 1.
Baseline characteristics of the study population by categories of insufficient sleep
| Characteristics | Insufficient rest/sleep <30 days (n=73,835) | Insufficient rest/sleep for 30 days (n=9,237) | p-value |
|---|---|---|---|
| Age, years | 48.1±0.1 | 44.3±0.3 | <0.0001 |
| Women, % | 49.4±0.41 | 55.2±1.1 | <0.0001 |
| Race-ethnicity, % | <0.0001 | ||
| Non-Hispanic whites | 68.7±0.4 | 66.2±1.1 | |
| Non-Hispanic blacks | 10.7±0.3 | 13.1±0.7 | |
| Mexican Americans | 15.1±0.4 | 15.3±1.0 | |
| Others | 5.4±0.2 | 5.3±0.6 | |
| Education categories, % | <0.0001 | ||
| Below high school | 10.6±0.3 | 15.5±0.8 | |
| High school | 27.8±0.4 | 33.6±1.0 | |
| Above high school | 61.5±0.4 | 50.9±1.1 | |
| Employment status, % | <0.0001 | ||
| Employed | 55.1±1.1 | 61.6±0.4 | |
| Unemployed | 5.2±0.2 | 7.2±0.7 | |
| Student/home makers | 10.3±0.3 | 12.5±0.8 | |
| Retired | 18.3±0.2 | 11.1±0.5 | |
| Unable to work | 4.6±0.1 | 14.0±0.7 | |
| Heavy alcohol drinker, % | 5.0±0.19 | 5.6±0.5 | 0.27 |
| No regular exercise, % | 24.7±0.4 | 38.6±1.1 | <0.0001 |
| Mental illness, % | 0.9±0.04 | 1.7±0.1 | <0.0001 |
| Body mass index, % | <0.0001 | ||
| Normal (<25 kg/m2) | 35.1±0.4 | 29.6±1.0 | |
| Overweight (25–29.9 kg/m2) | 37.3±0.4 | 33.1±1.0 | |
| Obese (≥30 kg/m2) | 27.6±0.4 | 37.4±1.1 |
*
Data presented are row percentages or mean values and corresponding standard error
†
P-value based on analysis of variance or chi-square test, as appropriate.