Research Article
Time in Bed Is Associated with Decreased Physical Activity and Higher BMI in Women Seeking Weight Loss Treatment
Table 1
Unadjusted mean (standard deviations) for BMI, physical activity, and dietary variables by sleep categories (
).
| | | Sleep duration categories
| | |
≤6 hrs
() | >6 to ≤7 hrs
() | >7 to ≤8 hrs
() | >8 to ≤9 hrs
() | >9 hrs
() | valuea |
| | Body mass index, mean (SD) | 38.8 (5.5) | 36.0 (5.0) | 36.1 (5.8) | 35.8 (5.6) | 36.3 (5.8) | 0.04 | | Paffenbarger physical activity (kcal burned), mean (SD) | 556.0 (889.7) | 752.9 (1148.4) | 934.6 (1215.3) | 713.7 (746.4) | 788.3 (981.4) | 0.07 | | block FFQ, mean (SD) | | | | | | | | kcal | 2064.8 (961.0) | 1917.5 (903.2) | 2219.2 (1055.0) | 1965.4 (883.3) | 2187.0 (1054.3) | NS | | % kcal from fat | 41.4 (8.2) | 39.8 (7.0) | 40.2 (7.1) | 41.1 (8.37) | 41.3 (7.9) | NS | | % kcal from protein | 15.0 (2.8) | 15.6 (3.3) | 15.7 (3.0) | 15.5 (3.5) | 15.4 (3.0) | NS | | % kcal from carbohydrates | 45.4 (8.1) | 45.8 (7.5) | 44.9 (7.4) | 43.9 (9.3) | 43.8 (8.9) | NS | | % kcal from sweets | 14.4 (7.8) | 12.9 (9.0) | 12.8 (8.9) | 12.0 (8.8) | 13.6 (12.9) | NS |
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Statistical significance was determined using a quadratic orthogonal contrast, motivated by a priori hypothesis of a U-shaped response.
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