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Characteristic No. (%) of patients* Age, yr, mean ± SD (median, range) 15.2 ± 1.6 (15.4, 12.0–17.6) Female sex 65 (89) Comorbid medical diagnosis at admission 22 (30) Comorbid psychiatric diagnosis at admission 25 (34) Admitted directly from emergency department 64 (88) BMI at admission, kg/m2, mean ± SD (median, range) 16.4 ± 2.5 (16.1, 11.3–26.2) Duration of symptoms, wk, mean ± SD (median, range) 55.8 ± 59.9 (41.6, 4.4–362.9) Length of stay, d, mean ± SD (median, range) 37.9 ± 19.7 (35, 9–153) Household income by postal code, CAD, mean ± SD (median, range) 83 752 ± 33 415
(82 795, 30 979–207 589)Distance travelled between home and hospital, km, mean ± SD (median, range) 39.6 ± 33.4 (31.8, 2.7–134.0) Note: BMI = body mass index, CAD = Canadian dollars, SD = standard deviation. *Unless otherwise indicated.
Variable Total cost,* $ Mean ± SD Median (range) Hospital cost 51 349 ± 26 598 47 304 (15 790–194 618) Caregiver cost 3 583 ± 1 904 3 146 (673–11 119) Lost work productivity 766 ± 389 673 (93–2 080) Lost leisure time 2 817 ± 1 588 2 565 (531–9 039) Societal cost† 54 932 ± 27 864 49 807 (16 488–201 036) *In 2013 Canadian dollars (US$1 = Can$1.03 in 2013). †Sum of hospital and caregiver costs.
- Table 3: Multivariate linear regression model for hospital 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 11.979 (0.317) NA NA < 0.001 Wait time between referral and treatment –0.0170 (0.0103) –3.8 –902.45 0.10 BMI at admission –0.0740 (0.0191) –15.7 –3346.82 < 0.001 Note: R2 = 18.3%; BMI = body mass index, CAD = Canadian dollars, NA = not available, SE = standard error. *Values obtained through regression model of untransformed costs. †Wald test.
- 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.