Table 3.

Association of visceral adiposity and circadian timing of sleep during weekdays and weekends with blood pressure as a function of being in school vs. on break

	In School		On Break
	SBP	DBP	SBP	DBP
Weekdays
Visceral Adiposity	4.43 (0.87) <0.001*	1.99 (0.67) 0.003*	2.18 (1.08) 0.046*	1.88 (0.82) 0.023*
Sleep Midpoint	2.01 (1.13) 0.076 T	0.58 (0.87) 0.504	−2.54 (1.29) 0.052 T	−1.51 (0.98) 0.124
Visceral Adiposity * Sleep Midpoint	1.82 (0.81) 0.026*	1.27 (0.62) 0.043*	−0.54 (1.15) 0.642	−0.24 (0.87) 0.787
Visceral Adiposity	4.36 (0.87) <0.001*	1.94 (0.67) 0.004*	2.25 (1.10) 0.044*	1.91 (0.83) 0.023*
Sleep Irregularity	1.02 (0.72) 0.160	−0.23 (0.55) 0.684	−0.98 (1.75) 0.578	−0.86 (1.31) 0.512
Visceral Adiposity * Sleep Irregularity	0.44 (1.03) 0.667	0.55 (0.79) 0.490	2.92 (1.36) 0.034*	0.95 (1.04) 0.363
Weekends
Visceral Adiposity	4.36 (0.87) <0.001*	2.03 (0.67) 0.003*	2.54 (1.12) 0.025*	2.21 (0.84) 0.010*
Sleep Midpoint	−0.20 (0.80) 0.800	−0.24 (0.62) 0.697	−1.40 (1.28) 0.278	−0.27 (0.96) 0.776
Visceral Adiposity * Sleep Midpoint	−0.27 (0.76) 0.724	0.57 (0.59) 0.328	−2.43 (1.36) 0.077 T	−0.60 (1.04) 0.566
Weekends – Weekdays
Visceral Adiposity	4.20 (0.87) <0.001*	1.99 (0.67) 0.004*	2.41 (1.11) 0.033*	2.08 (0.83) 0.014*
ΔSleep Midpoint	−1.47 (0.75) 0.051T	−0.51 (0.58) 0.374	1.31 (1.27) 0.305	1.35 (0.95) 0.159
Visceral Adiposity * ΔSleep Midpoint	−1.96 (0.68) 0.004*	−0.69 (0.54) 0.201	−1.00 (1.37) 0.467	0.14 (1.03) 0.889

Data are unstandardized regression coefficients (standard error) p-value for each standard deviation increase (z-scores) associated with each independent variable (main effects without interaction in the model) and their interaction (with main effects in the model). Adjusted for sex, age, race/ethnicity, polysomnography-measured apnea/hypopnea index, actigraphy-measured sleep duration, and actigraphy-measured sleep variability.

^*p-value<0.05

^T0.05<p-value<0.10