Table 2.

Exponentiated linear regression coefficients (physician cost) and incidence rate ratios (number of physician visits) for the association of health behaviours with health-care utilization in grade 5 students from the Canadian province of Nova Scotia

	OR for physician costs 2001–2006 in $CAN				OR for no. of physician visits 2001–2006
	Univariate	95% CI	Multivariable*	95% CI	Univariate	95% CI	Multivariable*	95% CI
Screen time
≤2 h/d	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
>2 to 4 h/d	1·00	0·93, 1·09	0·98	0·91, 1·06	1·01	0·95, 1·08	0·99	0·93, 1·05
>4 h/d	0·97	0·88, 1·07	0·91	0·83, 1·01	0·99	0·92, 1·06	0·93	0·87, 1·00
Physically active
≤2 × /week	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
>2 to 4 × /week	1·03	0·92, 1·16	1·02	0·90, 1·14	1·05	0·96, 1·16	1·03	0·94, 1·13
>4 to 7 × /week	1·05	0·96, 1·16	1·07	0·97, 1·18	1·02	0·94, 1·09	1·04	0·97, 1·12
>7 × /week	1·08	0·97, 1·19	1·09	0·99, 1·21	1·04	0·96, 1·06	1·07	0·99, 1·16
Diet Quality Index
Lowest tertile	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
Middle tertile	0·99	0·90, 1·07	1·00	0·92, 1·09	0·97	0·91, 1·04	0·99	0·92, 1·05
Highest tertile	0·92	0·84, 1·01	0·93	0·85, 1·02	0·93	0·87, 0·99	0·94	0·88, 1·00
Healthy Eating Index
Lowest tertile	1·00	Ref.	1·00	Ref.	1·00	Ref.	1·00	Ref.
Middle tertile	0·95	0·86, 1·04	0·95	0·87, 1·05	0·95	0·88, 1·01	0·95	0.89, 1.02
Highest tertile	0·96	0·87, 1·05	0·96	0·88, 1·07	0·93	0·86, 1·00	0·94	0.87, 1.00

Exponentiated coefficients of the natural logarithm of physician costs represent the relative cost v. the reference group (Ref.).

*Adjusted for gender, household income, parental education and geographic region.