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Table 4 Multivariate regression analysis for factors associated with prescription of PIMa according to the 2012 Beers Criteria

From: Prescription of potentially inappropriate medication in Korean older adults based on 2012 Beers Criteria: a cross-sectional population based study

  Subjects with 1–4 PIM claims Subjects with ≥5 PIM claims
Characteristics OR (95% CI) OR (95% CI)
Age, 65–69 years   
70–74 0.98 (0.89–1.09) 1.16 (1.10–1.22)
75–79 1.16 (1.05–1.29) 1.33 (1.26–1.41)
80–84 1.50 (1.34–1.69) 1.61 (1.51–1.72)
≥85 1.89 (1.64–2.18) 1.93 (1.78–2.09)
Female gender 1.19 (1.17–1.21) 1.53 (1.48–1.59)
Specialty other than physician 1.23 (1.22–1.24) 1.46 (1.43–1.50)
Other than primary care facilities 0.84 (0.83–0.85) 0.72 (0.71–0.73)
Rural area 1.02 (1.00–1.04) 0.85 (0.82–0.88)
Insured by NHIb 0.88 (0.85–0.90) 0.83 (0.78–0.88)
No. of OPDc visits within 1 year (≤1 vs. >1) 0.79 (0.78–0.80) 0.68 (0.65–0.71)
Severity of comorbiditiesd 1.21 (1.19–1.22) 2.25 (2.20–2.31)
Polypharmacye 3.51 (3.46–3.56) 7.81 (7.56–8.06)
  1. aPIM, potentially inappropriate medication; bNHI, national health insurance; cOPD, outpatient department; dBased on Charlson Comorbidity Index13; ePolypharmacy defined as ≥6 medications prescribed in one claim24