Table 1.

Characteristics of the 244 464 children between 7 and 13 years of age according to sex and NAFLD status

Characteristics	Boys				Girls
	NAFLD cases		Non-cases		NAFLD cases		Non-cases
	n		n		n		n
BMI age 7, mean±SD	1264	15.4±1.2	120 516	15.5±1.2	1106	15.4±1.3	121 578	15.4±1.4
BMI age 8, mean±SD	1263	15.8±1.3	119 680	15.8±1.4	1106	15.8±1.5	120 739	15.8±1.6
BMI age 9, mean±SD	1259	16.2±1.4	117 176	16.2±1.5	1102	16.2±1.6	118 526	16.2±1.7
BMI age 10, mean±SD	1251	16.6±1.6	116 030	16.6±1.7	1101	16.7±1.8	117 432	16.7±1.9
BMI age 11, mean±SD	1248	17.0±1.8	116 270	17.1±1.9	1096	17.2±2.0	117 604	17.2±2.1
BMI age 12, mean±SD	1256	17.5±1.9	117 832	17.6±2.1	1101	17.8±2.3	119 089	17.8±2.3
BMI age 13, mean±SD	1264	18.1±2.0	120 516	18.2±2.2	1106	18.7±2.4	121 578	18.7±2.5
Change in BMI z-score between 7 and 13 years, mean±SD	1264	0.11±0.64	120 516	0.05±0.67	1106	0.15±0.68	121 578	0.11±0.69
Age at entry, mean (range)	1264	44.4 (18.0 to 60.0)	120 516	38.8 (18.0 to 60.0)	1106	44.9 (18.0 to 60.0)	121 578	39.0 (18.0 to 60.0)
Age at exit, mean (range)	1264	53.4 (18.0 to 78.6)	120 516	56.4 (18.0 to 80.0)	1106	54.8 (20.1 to 78.3)	121 578	57.1 (18.0 to 80.0)

BMI, body mass index; NAFLD, non-alcoholic fatty liver disease; n, number.