Table 4

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

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)

CI: confidence interval; *Adjusted for number of prescriptions, age, and length of stay

Rancourt et al. BMC Geriatrics 2004 4:9   doi:10.1186/1471-2318-4-9