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. 2017 Oct 6;5(4):E746–E752. doi: 10.9778/cmajo.20170007

Table 2: Factors associated with hospital admission for ambulatory-care-sensitive conditions*.

Variable Rate ratio (95% CI)†
All ages Age  65 yr Rural residence
Physician retention tertile
    Q1 (lowest) 1.199 (1.152-1.247) 1.047 (0.968-1.133) 1.232 (1.168-1.299)
    Q2 1.165 (1.126-1.204) 1.001 (0.943-1.075) 1.198 (1.135-1.265)
    Q3 (highest) (reference) 1.000 1.000 1.000
Age‡ 0.999 (0.998-0.999) 1.008 (1.004-1.011) 1.002 (1.001-1.003)
Income quintile
    Q1 (lowest) 1.212 (1.162-1.264) 1.177 (1.084-1.277) 1.178 (1.118-1.241)
    Q2 1.166 (1.121-1.214) 1.135 (1.049-1.228) 1.131 (1.076-1.188)
    Q3 1.133 (1.088-1.179) 1.070 (0.989-1.159) 1.116 (1.062-1.172)
    Q4 1.145 (1.101-1.190) 1.165 (1.077-1.261) 1.165 (1.110-1.221)
    Q5 (highest) (reference) 1.000 1.000 1.000
Residence status
    Rural 1.198 (1.157-1.365) 1.302 (1.217-1.393) -
    Urban (reference) 1.000 1.000
Charlson Comorbidity Index score
    0 0.086 (0.083-0.089) 0.113 (0.104-0.123) 0.093 (0.090-0.098)
    1-2 0.267 (0.258-2.276) 0.430 (0.405-0.457) 0.290 (0.279-1.303)
    3-4 0.396 (0.382-0.411) 0.580 (0.549-0.614) 0.423 (0.404-0.441)
     5 (reference) 1.000 1.000 1.000
High school diploma‡ 0.991 (0.990-0.992) 0.990 (0.987-0.991) 0.990 (0.989-0.991)
Visible minority‡ 0.993 (0.987-0.998) 0.992 (0.982-1.002) 0.981 (0.972-0.990)
Aboriginal identity‡ 1.006 (1.005-1.007) 1.006 (1.003-1.009) 1.007 (1.006-1.008)
Distance to nearest acute care facility‡ 0.998 (0.997-0.998) 0.998 (0.997-0.999) 0.997 (0.997-0.998)
Acute care hospital beds per 1000 residents‡ 1.000 (0.990-1.010) 0.998 (0.980-1.016) 1.003 (0.992-1.014)
Family physicians per 1000 residents‡ 1.363 (1.318-1.409) 1.261 (1.175-1.352) 1.346 (1.300-1.394)

Note: CI = confidence interval.

*Analysis excludes 7989 residents with missing data for 1 or more covariates (less than 1% of sample).

†Equal to the exponent of the regression coefficient and adjusted for all other variables in the table.

‡Included in continuous form in the final models.