Table 2.
Associations between total sleep time and measures of central obesity after adjustment for potential confoundersa,b
| Waist circumference (cm) |
Sagittal abdominal diameter (cm) |
|||
|---|---|---|---|---|
| Adj. β-value | P-value | Adj. β-value | P-value | |
| Total sleep time (hours) | −1.24 | 0.016 | −0.46 | 0.001 |
| Slow wave sleep (minutes) | −0.058 | 0.025 | −0.013 | 0.068 |
| Slow wave sleep (%) | −0.20 | 0.050 | −0.034 | 0.21 |
| REM sleep (minutes) | −0.062 | 0.002 | −0.021 | < 0.0001 |
| REM sleep (%) | −0.15 | 0.074 | −0.057 | 0.013 |
| Sleep efficiency (%) | −0.13 | 0.014 | −0.043 | 0.003 |
| Age (years) | 0.11 | 0.069 | 0.037 | 0.020 |
| Exercise level | ||||
| High | 0 | 0 | ||
| Medium | 3.21 | 0.045 | 1.34 | 0.002 |
| Low | 10.95 | < 0.0001 | 3.39 | < 0.0001 |
| Smoking | ||||
| Non-smoker | 0 | 0 | ||
| Ex-smoker | 1.06 | 0.43 | −0.12 | 0.73 |
| Currentsmoker | 1.29 | 0.41 | −0.10 | 0.81 |
| Alcohol consumption (grams/week) | 0.0061 | 0.55 | 0.0008 | 0.77 |
| Apnea-hypopnea index | 2.53 | < 0.0001 | 0.59 | < 0.0001 |
a
Results are presented as adjusted estimated β-values with P-values.
b
β-values are adjusted for age, level of physical activity, smoking status, alcohol consumption, and apnea-hypopnea index.