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Table 4 Predictors of potentially inappropriate prescription among elderly patients in long-term care (N = 2,481)

From: Potentially inappropriate prescriptions for older patients in long-term care

Predictor Proportion of patients with PIP (%) Crude odds ratio (95% CI) Adjusted odds ratio (95% CI)*
Number of prescribed drugs (increments of one drug) 54.7 1.38 (1.33–1.43) 1.36 (1.32–1.41)
Gender
   Women 54.5 1.00 -
   Men 55.5 1.04 (0.87–1.25) -
Age
   65 to 74 years 66.7 1.00 1.00
   75 to 84 years 56.4 0.65 (0.51–0.81) 0.74 (0.58–0.96)
   85 years or more 47.7 0.46 (0.36–0.57) 0.60 (0.47–0.77)
Length of stay
   <10 years 51.1 1.00 1.00
   ≥10 years 67.4 1.98 (1.62–2.41) 1.78 (1.43–2.20)
  1. CI: confidence interval; *Adjusted for number of prescriptions, age, and length of stay