Table 2.

Characteristics^* of primary and secondary schools surveyed, Quebec, Canada, 2008–2009

	Primary schools		Secondary schools
	Median	IQR	Median	IQR
Population density (habitants/km2)	287·0	742·0	295·0	1020·0
School size	230·0	161·0	875·0	763·0
LICO (2008–2009)	5·0	4·0	5·0	5·0
Proportion of students having lunch at school (%)	75·0	38·0	69·0	35·0
Number of meal periods	2·0	1·0	1·0	0·0
	r s	P	r s	P
Population density × School size	0·593	<0·001	0·578	<0·001
Population density × LICO	0·306	0·002	0·621	<0·001
School size × LICO	−0·090	0·429	0·265	0·027

IQR, interquartile range; LICO, low-income cut-off; r _s, Spearman’s rho.

^*Weighted data.