Table 4: Multivariate linear regression model for caregiver costs per admission to hospital for anorexia nervosa in adolescent patients

Predictor variable	Logarithmic cost model (SE)	Calculated marginal change, %	Approximate marginal cost change, CAD*	p value†
Intercept	10.909 (0.585)	NA	NA
Wait time between referral and treatment	–0.0194 (0.0105)	–4.8	–67.01	0.07
Age at admission	–0.0632 (0.0314)	–13.6	–123.08	< 0.05
BMI at admission	–0.113 (0.0222)	–23.0	–364.38	< 0.001

Note: R² = 31.8%; BMI = body mass index, CAD = Canadian dollars, NA = not available, SE = standard error. *Values obtained through regression model of untransformed costs. †Wald test.