Table 3.

Associations between daily weather conditions and physical activity (steps/day) according to day of the week and sex in 972 grade 5 students in Alberta, Canada in 2013

	School days (n = 4089)			Non-school days (n = 1869)			Girls (n = 562)			Boys (n = 392)
	β a	95% CI	p	β a	95% CI	p	β b	95% CI	p	β b	95% CI	p
Temperature (per 1 °C)
Actual temperature	35	5, 65	0.02	65	16, 114	< 0.01	54	25, 82	< 0.01	11	− 36, 57	0.6
Feels-like temperature	38	14, 63	< 0.01	60	20, 101	< 0.01	50	26, 73	< 0.01	13	− 25, 52	0.5
Cloud coverage (per 1 unit)c	− 12	− 50, 25	0.5	− 170	− 267, − 73	< 0.01	− 69	− 115, − 22	< 0.01	− 45	− 112, 22	0.2
Total precipitation/day
None (0 mm)	Ref.			Ref.			Ref.			Ref.
Light (0.01–5 mm)	− 423	− 793, − 53	0.02	− 232	− 422, 886	0.5	− 623	− 1015, − 231	< 0.01	327	− 241, 896	0.26
Heavy (> 5 mm)	− 663	− 1177, − 148	0.01	− 2427	− 3884, − 969	< 0.01	− 769	− 1410, − 128	0.02	− 1194	− 2154, − 234	0.01

All weather conditions are considered as daily averages between 7:00 a.m. and 9:00 p.m., except precipitation which is total daily amount (mm)

CI confidence interval

^aEstimates for each of weather conditions are derived from separate models. Each model is adjusted for sex, weight status, parent education, household income, and school region. Weather conditions are not mutually adjusted

^bEstimates for each of weather conditions are derived from separate models. Each model is adjusted for weight status, parent education, household income, school region, and day of the week. Weather conditions are not mutually adjusted

^cCloud coverage ranges from 0 to 10, with 0 being clear sky and 10 being overcast