Gender differences in the distribution of children’s physical activity: evidence from nine countries

Table 5 Association between gender and light-intensity activity as defined by Evenson cut points

Gender	N (%)	NO distribution		BCCG distribution
Gender	N (%)	Mean % Difference (SE)	SD % Difference (SE)	Median % Difference (SE)	Skewness^b
Girls (ref) Unadjusted	7998 (51.7)	361.93	77.73	364.43	1.29
Boys (Unadjusted Difference)	7463 (48.3)	0.82 (0.34)*	2.36 (1.14)*	0.90 (0.36)*	0.03 (0.05)
Boys^a (Adjusted Difference)	7463 (48.3)	0.88 (0.33)**	3.26 (1.14)**	0.87 (0.35)*	-0.02 (0.06)

BCCG Box-Cox Cole and Green distribution, SD Standard deviation, GAMLSS Generalized Additive Models for Location, Scale and Shape, SE Standard error
^* = p < 0.05, ** = p < 0.01, *** = p < 0.001
Differences in mean, variability and skewness estimated by GAMLSS
^aadjusted for parental education, BMI, and country. NO: normal distribution
^bSkewness is estimated as the Box-Cox power (that is, the power required to transform the outcome to a normal distribution, values closer to 1 represent less skew)

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