Time in Bed Is Associated with Decreased Physical Activity and Higher BMI in Women Seeking Weight Loss Treatment

Table 2

Differences in average BMI and Paffenbarger physical activity score between sleep duration groups (𝑁=318).

Sleep duration groups	BMI			Paffenbarger PA
	Difference (kg/m^2)^a	95% CI	𝑃 value	Percent reduction^b	95% CI	𝑃 value
≤6 h/night	2.2	0.1–4.3	0.04	54.6	0.0, 79.4	0.05
>6 to ≤7 h/night	−0.2	−1.8, 1.4	NS	40.4	−11.1, 68.0	0.10
>7 to ≤8 h/night	ref	ref	ref	ref	ref	ref
>8 to ≤9 h/night	0.1	−1.5, 1.7	NS	34.7	−21.0, 64.8	NS
>9 h/night	0.6	−1.4, 2.6	NS	45.8	−17.7, 75.0	NS

Note. Findings adjust for race, education, suspected apnea, age, urinary incontinence, BDI score, and alcohol use.
^aDifference in BMI. ^bBack transformed.