Table 1.

Baseline characteristics of study participants (n = 113, 36% male)

	Baseline characteristics
	Mean (SD)	Interquartile range
Age (years)	11.9 (1.8)	10.5 - 13.5
Height (cm)	147.2 (27.3)	142.1 - 159.0
Weight (kg)	46.3 (15.0)	36.3 - 84.7
BMI *	20.3 (4.1)	17.5 - 22.1
BMI z-score **	0.69 (1.1)	-0.09 - 1.33

*Body Mass Index = weight (kg)/height (m)²

**Body Mass Index z-score = the number of standard deviations above or below the reference values - computed using the LMS method [68,69]