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Table 3 Odds ratios (OR) and 95% confidence intervals (CI) for use of polypharmacy (4 or more regular prescription medicines) according to resource utilisation band (RUB).

From: Validating the Johns Hopkins ACG Case-Mix System of the elderly in Swedish primary health care

RUB OR model A
95%CI
n = 1144
OR model B
95%CI
n = 1144
OR model C
95%CI
n = 1144
OR model D
95%CI
n = 1144
0 1.0   1.0   1.0   1.0  
1 0.9 0.4–1.8 0.9 0.4–1.7 0.9 0.5–1.9 1.0 0.5–2.1
2 1.2 0.8–1.9 1.2 0.8–1.9 1.3 0.8–2.1 1.3 0.8–2.1
3 3.0*** 2.1–4.4 3.0*** 2.0–4.4 3.3*** 2.2–4.9 3.0*** 2.0–4.6
4 6.8*** 3.5–13.5 6.7*** 3.4–13.2 8.2*** 4.0–16.8 6.5*** 3.1–13.6
5 6.4* 1.2–35.2 7.0* 1.2–39.6 7.8* 1.5–41.0 4.8 1.1–21.3
  1. * significant at 5%, ** significant at 1%, *** significant at 0.1%
  2. model A: adjusted for age
  3. model B: adjusted for age and sex
  4. model C: adjusted for age, sex, level of education and IADL function
  5. model D: adjusted for age, sex, level of education, IADL function, SCB and Ware