Table 4.

App satisfaction ratings for high and low app users (intervention group only, n 416) among 14–16-year-old adolescents, ‘Snack Track School’ app intervention, Flanders, Belgium, January–April 2016

	Low app users (n 123)		High app users (n 145)
	Mean†	sd	Mean†	sd
Competence (range 0–4)	0·72	0·07	1·04**	0·08
Immersion (range 0–4)	0·46	0·06	0·48	0·06
Flow (range 0–4)	0·36	0·11	0·20*	0·08
Annoyance (range 0–4)	0·96	0·02	0·86	0·04
Challenge (range 0–4)	0·63	0·06	0·51	0·01
Negative affect (range 0–4)	2·01	0·05	1·99	0·06
Positive affect range (0–4)	0·62	0·10	0·76*	0·10

*P<0·05, **P<0·01.

^†Adjusted for clustering.