Table 2.
General characteristics of the study population stratified by sex and self-reported sleep duration
| Variable | Men |
Women |
||||||
|---|---|---|---|---|---|---|---|---|
| ≤5 h/d (n=216) | 6–8 h/d (n=1,204) | ≥9 h/d (n=122) | P-value* | ≤5 h/d (n=402) | 6–8 h/d (n=1,461) | ≥9 h/d (n=127) | P-value* | |
| Age (y) | 57.5±0.8 | 52.9±0.4 | 56.2±1.1 | <0.001 | 60.8±0.8 | 54.1±0.4 | 59.5±1.4 | <0.001 |
| Height (cm) | 168.0±0.1 | 169.0±0.2 | 167.0±0.1 | 0.005 | 154.0±0.5 | 156.0±0.2 | 154.0±0.1 | <0.001 |
| Body weight (kg) | 67.8±0.9 | 68.9±0.3 | 65.2±1.2 | 0.007 | 57.1±0.6 | 58.0±0.3 | 57.1±0.9 | 0.257 |
| Waist circumference (cm) | 85.1±0.8 | 85.3±0.3 | 83.2±1.0 | 0.152 | 81.5±0.5 | 80.2±0.4 | 82.3±1.5 | 0.025 |
| Body mass index (kg/m2) | 24.1±0.28 | 24.12±0.09 | 23.29±0.31 | 0.042 | 24.01±0.19 | 23.93±0.11 | 24.18±0.4 | 0.758 |
| Total body fat (%) | 22.9±0.5 | 23.5±0.3 | 21.9±0.7 | 0.021 | 34.6±0.4 | 34.7±0.2 | 35.5±0.6 | 0.289 |
| ASM (kg) | 21.4±0.3 | 21.6±0.1 | 20.8±0.3 | 0.099 | 14.1±0.2 | 14.2±0.1 | 13.7±0.2 | 0.052 |
| ASM/body weight (%) | 31.64±0.25 | 31.45±0.13 | 32.14±0.36 | 0.098 | 24.84±0.18 | 24.61±0.11 | 24.21±0.26 | 0.059 |
| Current smoker | 38.2 (±3.8) | 40.6 (±2.0) | 46.3 (±4.7) | 0.404 | 5.8 (±1.6) | 4.4 (±0.8) | 4.3 (±2.2) | 0.695 |
| Alcohol drinker | 67.3 (±4.0) | 78.5 (±1.4) | 70.6 (±4.8) | 0.005 | 30 (±2.6) | 39.6 (±1.6) | 31.8 (±4.9) | 0.005 |
| Regular exercise | 24.8 (±3.7) | 24.4 (±1.7) | 25.3 (±4.9) | 0.979 | 20.3 (±2.7) | 22.3 (±1.6) | 16.8 (±3.6) | 0.448 |
| Lowest household income | 27 (±3.6) | 14.2 (±1.3) | 18.5 (±4.1) | <0.001 | 35.4 (±3.2) | 19.4 (±1.5) | 41.6 (±5.6) | <0.001 |
Values are presented as mean±standard error or % (±standard error).
ASM, appendicular skeletal muscle mass.
*
Calculated using analysis of variance and chi-square tests.