BMI and recommended levels of physical activity in school children

BMC Public Health

Table 3 Cut-off points for min·day⁻¹ in physical activity^a/sedentary to differentiate between normal weight and overweight/obese^b children

	AUC (95%CI)	Youden index	Cut-off (min·day⁻¹)	Sensitivity	Specificity
Total
Sedentary	0.64 (0.58; 0.70)	.255	388	0.69	0.57
LPA	0.58 (0.52; 0.64)	.205	348	0.71	0.50
MPA	0.61 (0.55; 0.67)	.234	38	0.79	0.45
VPA	0.64 (0.58; 0.70)	.260	5	0.79	0.47
MVPA	0.62 (0.56; 0.68)	.230	46	0.78	0.45
Male
Sedentary	0.63 (0.54; 0.72)	.249	382	0.77	0.48
LPA	0.60 (0.51; 0.68)	.286	344	0.64	0.65
MPA	0.63 (0.54; 0.72)	.239	69	0.62	0.62
VPA	0.67 (0.58; 0.75)	.290	20	0.55	0.74
MVPA	0.65 (0.56; 0.73)	.276	76	0.77	0.51
Female
Sedentary	0.65 (0.57; 0.72)	.288	410	0.59	0.69
LPA	0.55 (0.47; 0.64)	.137	349	0.78	0.36
MPA	0.63 (0.55; 0.71)	.263	39	0.67	0.59
VPA	0.66 (0.58; 0.74)	.317	6	0.65	0.67
MVPA	0.64 (0.56; 0.72)	.271	46	0.66	0.61

P-values indicate AUC significantly > 0.50
^aLPA: light physical activity (1.5–3.9 METs), MPA: moderate physical activity (MPA; 4–5.9 METs), VPA: vigorous physical (VPA; > = 6 METs)
MVPA: moderate to vigorous physical activity
^bClassification through BMI z-scores, calculated according to WHO standards: normal weight > = − 2 SD and < = + 1SD, overweight/obese > +1 SD

ISSN: 1471-2458