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Table 3 Unadjusted and adjusted ORs for the association between PIP and its predictors

From: Potentially inappropriate prescribing among older people in the United Kingdom

PIP (ever/never) Unadjusted odds ratios (95% CIs) Adjusted odds ratios* and (95% CIs)
Polypharmacy   
  -Never (ref) 1.0 1.0
  -Ever 19.4 (19.2-19.7) 18.2 (18.0-18.4)
Age (years)   
  -70–74 (ref) 1.0 1.0
  -75–80 1.0 (1.0- 1.0) 0.9 (0.9-0.9)
  -81–85 0.8 (0.8-0 .8) 0.8 (0.8-0.8)
  - > 85 0.3 (0.3-0.3) 0.4 (0.4-0.4)
Gender   
  -Male (ref) 1.0 1.0
  -Female 1.0 (1.0-1.0) 0.9 (0.9- 0.9)
  -Missing   1.5 (1.5-1.5)
Mobidities (Charlson morbidity index score)   
  -1 (ref) 1.0 1.0
  -2 2.2 (2.2-2.3) 1.51 (1.5-1.5)
  -3 0.4 (0.4-0.40) 0.9 (0.9-0.9)
  1. *Adjusted for age (70–74, 75–80, 81–85,>85 years), gender, morbidity (charlson morbidity index: 1 representing a lower number of comorbidities and 3 higher) and polypharmacy (ever/never).