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Table 4 GEE regression analysis to estimate the effects of specific mental disorders on length of stay for ‘At Home’ participants during a 10-year pre-recruitment period (n = 433)

From: A 10-year retrospective analysis of hospital admissions and length of stay among a cohort of homeless adults in Vancouver, Canada

Independent variables Unadjusted rate ratio (95 % CI)a P value Adjusted rate ratio (95 % CI)b P value
Age at each pre-recruitment year (per year) 1.0 (1.0. 1.0) 0.012 1.0 (1.0, 1.0) 0.314
Time (per year) 1.2 (1.2. 1.2) <0.001 1.1 (1.0, 1.1) 0.002
Female gender 1.3 (0.9, 1.8) 0.182 1.1 (0.8, 1.6) 0.427
Aboriginals (yes vs. no) 0.7 (0.5, 1.1) 0.103 0.8 (0.5, 1.2) 0.200
White (yes vs. no) 1.0 (0.8, 1.4) 0.877 0.9 (0.6, 1.2) 0.426
Schizophrenia (yes vs. no) 15.6 (12.0, 20.4) <0.001 13.7 (9.7, 19.5) <0.001
Bipolar disorder (yes vs. no) 7.6 (5.9, 9.8) <0.001 3.5 (2.4, 5.0) <0.001
Personality disorder (yes vs. no) 2.2 (1.5, 3.2) <0.001 1.6 (1.0, 2.5) 0.069
Depressive disorder (yes vs. no) 2.8 (2.2, 3.6) <0.001 1.7 (1.2, 2.3) 0.003
Anxiety-neurotic disorder (yes vs. no) 2.4 (1.9, 3.0) <0.001 1.4 (1.0, 1.9) 0.034
Alcohol dependence (yes vs. no) 1.9 (1.3, 2.6) <0.001 1.4 (0.9, 2.3) 0.185
Drug dependence (yes vs. no) 1.8 (1.4, 2.2) <0.001 1.6 (1.1, 2.2) 0.012
Non-psychiatric service utilizationc     
 High (≥32) 2.4 (1.8, 3.1) <0.001 3.4 (2.2, 5.2) <0.001
 Medium (16 to 31) 1.5 (1.1, 2.1) 0.014 1.2 (0.8, 1.8) 0.286
 Low (≤15) Reference - Reference -
  1. a-The CI were estimated using Robust Standard errors
  2. b- The CI were estimated using Robust Standard errors
  3. c-50th and 75th percentile were used as a cutoff value for medium and high groups respectively