Table 1

Relationships between the physical home environment and children's outdoor playtime for the previous day (n = 276) (ANOVA used for categorical variables and Pearson correlation for continuous variables).
Descriptive Construct	Physical Home Environment Item	Children's Physical Activity Mean outdoor playtime score (range = 0–18)				p value

		≥ Once a week	Fortnightly to monthly	Couple of times a year	Nil in last 12 months
Role modelling	Mother's frequency of walking >30 mins per day	8.8^a	7.3^ab	8.2^ab	6.0^b	0.008
	Mother's frequency of organised sport	9.0^a	8.9^ab	8.5^ab	7.5^b	0.04
	Father's frequency of walking >30 mins per day	8.7^ab	7.8^ab	9.5^a	7.2^b	0.03

		Very much	Quite a bit	Not very much	Not at all
Physical attributes of the home	Presence of labour saving devices	8.3^ab	8.1^ab	9.1^a	7.1^b	0.04
	Size of backyard	291 ± 358.3 (0–3000) m2 [r = 0.20^c]				0.001
	Number of items of outdoor play equipment	11 ± 3.15 (2–19) items of equipment [r = 0.17^c]				0.003

^a,bSuperscripts indicate which categories show a statistically significant difference using Bonferroni correction: same letter indicates no difference, different letter indicates a difference. ^cPearson correlation coefficient
Spurrier et al. International Journal of Behavioral Nutrition and Physical Activity 2008 5:31 doi:10.1186/1479-5868-5-31