Changes in fitness and fatness in Australian schoolchildren during the summer holidays: fitness lost, fatness regained? A cohort study

Table 3 Annualised rates of change in fatness and fitness metrics during the holiday periods compared to in-school periods

Predictor	Versus	%BF	p	zBMI	p	Waist:Ht%	p	VO_2max	p	SBJ	p
Time	Holidays vs Grade 4 in-school	3.9	0.08	0.2	0.54	-0.3	0.9	-4.7	0.01	17.2	0.12
	Holidays vs Grade 4 in-school	(-0.4 to 8.1)	0.08	(-0.3 to 0.7)	0.54	(-4.4 to 3.9)	0.9	(-8.3 to -1.2)	0.01	(-4.2 to 38.6)	0.12
	Holidays vs Grade 5 in-school	4.7	0.03	0.2	0.52	-0.4	0.86	-4.4	0.015	10.6	0.33
	Holidays vs Grade 5 in-school	(0.5 to 9.0)	0.03	(0.3 to 0.7)	0.52	(-4.6 to 3.8)	0.86	(-8.0 to -0.9)	0.015	(-10.8 to 32.0)	0.33

The table depicts the differences in annualised rates of change (and 95% CIs) during the holiday period compared to the two in-school periods (School Year Grade 4 and School Year Grade 5). For example, during the holiday period, body fat percentage increased at a rate of 4.7%BF/year more than during Grade 5.
BF = percentage body fat; SBJ = standing broad jump (cm); V̇O_2max = maximal aerobic power (ml/kg/min); Waist:Ht% = waist-to-height ratio (as a percentage); zBMI = BMI z-score. Note: p < 0.05 shown in boldface

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