Table 3. Multilevel models for physical activity predicting sleep.

Physical Activity	Onset latency, min	Sleep time, min	Efficiency, %	Fragmentation index
Daily activity counts, ct·min-1·d-1	-.04 (.08)	-.04 (.02)**	-.007 (.009)	-.008 (.04)
MVPA, min	-.05 (.05)	-.02 (.01)*	-.004 (.006)	.004 (.03)

Data are regression coefficient (standard error). Physical activity and sleep variables are log transformed. Physical activity variables were entered separately.

Covariates: age, education, BMI, depressive symptoms, arthritis, accelerometer wear time

BMI = body mass index

MVPA = moderate to vigorous physical activity

^*p<.05,

^**p<.01