Table 3.
Adjusted mean (standard error) biological characteristics by napping groups
| Characteristic | 0 N = 66 | 1 nap N = 44 | 2-3 naps N = 59 | 4 naps + N = 55 | p-value for linear trend |
|---|---|---|---|---|---|
| Waist circumference (cm) | 94.41 (1.61) | 95.32 (2.00) | 97.61 (1.71) | 100.2 (1.77) | 0.01 |
| Body mass index (kg/m2) | 28.79 (0.59) | 29.22 (0.73) | 29.44 (0.63) | 31.46 (0.65) | 0.004 |
| Resting systolic blood pressure (mm Hg) | 131.1 (1.81) | 133.7 (2.24) | 133.5 (1.92) | 132.7 (1.98) | 0.59 |
| Resting diastolic blood pressure (mm Hg) | 80.03 (1.25) | 81.37 (1.55) | 81.27 (1.33) | 79.73 (1.37) | 0.87 |
Analysis of covariance adjusted for age, race, gender, and depressive symptoms.