Longitudinal associations of screen time, physical activity, and sleep duration with body mass index in U.S. youth

Table 5 Compositional variation matrix of pair-wise variation of two behaviors by sex

	Socializing	Streaming	Gaming	Physical Activity	Other Activities	Sleep
	Females (n = 2,542)
Socializing	0.0
Streaming	1.1	0.0
Gaming	1.3	0.9	0.0
Physical Activity	15.0	15.3	15.3	0.0
Other Activities	1.3	1.2	1.4	14.0	0.0
Sleep	0.9	0.7	0.9	13.9	0.2	0.0
	Males (n = 2,622)
Socializing	0.0
Streaming	1.1	0.0
Gaming	1.2	0.9	0.0
Physical Activity	13.0	13.2	13.6	0.0
Other Activities	1.2	1.2	1.5	12.2	0.0
Sleep	0.8	0.7	1.0	12.0	0.2	0.0

The values in the compositional variation matrix are log ratios of pair-wise variation of two behaviors. A zero value within the compositional variation matrix is indicative of the two behaviors being completely proportional and whereas higher values are indicative of the two behaviors having lower proportionality. The analytic sample does not contain participants with 0 min per day of socializing, streaming, or gaming

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