Crude proportion and crude and adjusted ORs of frequent users of the emergency department in Quebec, fiscal year 2014/15
| Characteristics* | Frequent ED users, n (%) n = 213 921 | Unadjusted ORs (95% CI)† | Adjusted ORs‡ (95% CI)† |
|---|---|---|---|
| Age group, yr | |||
| 18–24 | 19 726 (4.1) | 1.00 (Ref.) | 1.00 (Ref.) |
| 25–34 | 28 244 (4.0) | 0.99 (0.97–1.01) | 0.88 (0.86–0.89) |
| 35–44 | 26 399 (3.4) | 0.82 (0.81–0.84) | 0.70 (0.69–0.71) |
| 45–54 | 32 464 (3.2) | 0.78 (0.77–0.80) | 0.62 (0.61–0.63) |
| 55–64 | 34 312 (3.3) | 0.79 (0.78–0.81) | 0.56 (0.55–0.57) |
| 65–74 | 31 973 (4.2) | 1.05 (1.03–1.07) | 0.62 (0.61–0.63) |
| 75–84 | 26 828 (7.0) | 1.78 (1.74–1.81) | 0.83 (0.81–0.85) |
| 85+ | 13 975 (10.4) | 2.74 (2.68–2.80) | 1.06 (1.03–1.08) |
| Sex | |||
| Male | 93 602 (3.7) | 1.00 (Ref.) | 1.00 (Ref.) |
| Female | 120 319 (4.3) | 1.18 (1.17–1.19) | 1.12 (1.11–1.13) |
| Location | |||
| Nonrural | 151 098 (3.6) | 1.00 (Ref.) | 1.00 (Ref.) |
| Rural | 62 823 (5.9) | 1.68 (1.67–1.70) | 1.66 (1.64–1.68) |
| Material deprivation | |||
| 1 (least deprived) | 25 930 (2.6) | 1.00 (Ref.) | 1.00 (Ref.) |
| 2 | 33 103 (3.2) | 1.25 (1.23–1.27) | 1.20 (1.18–1.22) |
| 3 | 38 668 (3.8) | 1.48 (1.46–1.50) | 1.33 (1.30–1.35) |
| 4 | 45 986 (4.5) | 1.76 (1.74–1.79) | 1.47 (1.45–1.49) |
| 5 (most deprived) | 54 892 (5.6) | 2.24 (2.20–2.27) | 1.74 (1.72–1.77) |
| Social deprivation | |||
| 1 (least deprived) | 34 899 (3.5) | 1.00 (Ref.) | 1.00 (Ref.) |
| 2 | 38 620 (3.8) | 1.09 (1.07–1.10) | 1.03 (1.02–1.05) |
| 3 | 39 607 (3.8) | 1.10 (1.09–1.12) | 1.06 (1.05–1.08) |
| 4 | 40 715 (4.1) | 1.18 (1.16–1.19) | 1.17 (1.15–1.19) |
| 5 (most deprived) | 44 738 (4.6) | 1.34 (1.32–1.36) | 1.36 (1.34–1.38) |
| No mental disorder | |||
| 0 physical condition | 96 581 (2.7) | 1.00 (Ref.) | 1.00 (Ref.) |
| 1 physical condition | 31 438 (4.1) | 1.52 (1.50–1.54) | 1.60 (1.58–1.62) |
| 2 physical conditions | 11 703 (6.6) | 2.54 (2.49–2.59) | 2.60 (2.54–2.65) |
| 3 physical conditions | 6192 (9.7) | 3.85 (3.75–3.95) | 3.80 (3.69–3.91) |
| 4+ physical conditions | 13 007 (15.8) | 6.73 (6.59–6.86) | 6.21 (6.08–6.35) |
| Common mental disorders | |||
| 0 physical conditions | 22 990 (5.5) | 2.07 (2.04–2.10) | 2.08 (2.04–2.11) |
| 1 physical conditions | 8072 (7.9) | 3.08 (3.01–3.16) | 3.15 (3.07–3.22) |
| 2 physical conditions | 3759 (12.0) | 4.88 (4.71–5.05) | 4.81 (4.64–4.98) |
| 3 physical conditions | 2427 (15.6) | 6.60 (6.32–6.89) | 6.28 (6.00–6.56) |
| 4+ physical conditions | 6952 (23.7) | 11.08 (10.77–11.39) | 9.86 (9.57–10.15) |
| Serious mental disorders | |||
| 0 physical conditions | 4631 (9.7) | 3.86 (3.74–3.98) | 3.88 (3.76–4.00) |
| 1 physical conditions | 1977 (13.6) | 5.63 (5.37–5.91) | 5.73 (5.46–6.02) |
| 2 physical conditions | 1081 (18.2) | 7.94 (7.43–8.48) | 7.92 (7.41–8.47) |
| 3 physical conditions | 776 (20.7) | 9.32 (8.61–10.09) | 9.02 (8.32–9.77) |
| 4+ physical conditions | 2345 (28.6) | 14.32 (13.64–15.03) | 13.07 (12.44–13.74) |
Note: CI = confidence interval, ED = emergency department, OR = odds ratio, Ref. = reference category.
↵* Percentage of frequent ED users
↵† 95% confidence intervals calculated using Wald’s method for logistic regression.
↵‡ Adjusted for age, sex, material deprivation, social deprivation, and rurality. Model includes interaction terms for each combination of physical conditions and mental disorders.