Locally implemented prevention programs may reverse weight trajectories in half of children with overweight/obesity amid low child-staff ratios: results from a quasi-experimental study in France

Table 3 Weight status of schoolchildren at the first (2011) and last year (2015) of primary education according to weight status at inclusion (N = 827)

	First year	Change in weight status between the first and last year of primary education ^a			Last year
	N (%)	None	Negative	Positive	N (%)	p-value^b
Normal	658 (79.6)	624 (94.8)	34 (5.2)	0 (0)	695 (84.0)	0.002
Overweight	137 (16.6)	58 (42.3)	13 (9.5)	66 (48.2)	101 (12.2)
Obesity	32 (3.9)	13 (40.6)	0 (0)	19 (59.4)	31 (3.7)

^a Coded “positive” if obesity changed to overweight/normal or if overweight changed to normal; “negative” if normal changed to overweight/obesity or if overweight changed to obesity
^b: Data were compared by the McNemar test

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