Table 3.

Association between physical activity (counts per minute) and sleep latency, sleep duration and sleep efficiency before and after adjusting for sex, age and BMI z - scores

	Crude				Adjusted
	R2	β	95% CI	p value	R2	β	95% CI	p value
Sleep latency (min)	0.103	35.21	(5.67, 64.75)	0.02	0.152	33.65	(2.02, 65.28)	0.04
Sleep duration (Hours)	0.007	−142.1	(− 622.3, 338,1)	0.55	0.053	− 132.3	(− 620.6, 356,1)	0.59
Sleep efficiency (%)a	0.025	−4087	(−11,291, 3117)	0.26	0.071	− 4106	(− 11,948, 3736)	0.30

^a: percentage of minutes scored as sleep during the down time interval