Table 1.

Sociodemographic and behavioural characteristics of sample total (n = 742)^a, and grouped by frequency of canteen use

Demographics	Total	NEVb	SEL	OFT	P valuec
	n (%)	n (%)	n (%)	n (%)
Gender (female), n = 720	386 (53.6)	277 (57.1)	66 (46.5)	43 (46.2)	0.03
Parental education (≥13y), n = 690	417 (60.4)	306 (65.5)	71 (52.6)	40 (45.5)	< 0.001
Ethnicity (minority), n = 720	64 (8.9)	44 (9.1)	7 (4.9)	13 (14.0)	0.06
Self-efficacy (high), n = 684	366 (53.0)	271 (58.2)	55 (41.0)	40 (47.6)	0.001

^aDiscrepancies in size from sample total may exist owing to missing values

^bNEV: adolescents never or rarely using the school canteen (n = 485); SEL: adolescents using the school canteen once a week (n = 142); OFT: adolescents using the school canteen ≥2 times a week (n = 93)

^cChi-square test between frequency of canteen use groups