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Table 3 Multivariable analysis of antibiotic prescribing

From: Antibiotic prescribing in UK care homes 2016–2017: retrospective cohort study of linked data

VariableAdjusted incidence rate ratio (95% CI)
Gender
 MaleRef.
 Female1.03 (0.98–1.08)
Age
 65–74Ref.
 75–840.96 (0.89–1.04)
 85–940.99 (0.92–1.07)
 95+1.11 (0.99–1.24)
Type of care
 ResidentialRef.
 Nursing1.21 (1.13–1.30)
Dementia
 NoRef.
 Yes0.94 (0.89–1.00)
Respite care
 NoRef.
 Yes1.12 (1.0–1.24)
Entered care home during study period
 NoRef.
 Yes1.37 (1.30–1.44)
Status at end of study period
 In homeRef.
 Permanently Discharged1.44 (1.32–1.57)
 Died1.58 (1.50–1.67)
Number of reported infection episodes during study
 0Ref.
 11.44 (1.35–1.54)
 More than 12.09 (1.96–2.24)
Number of BNF chapters with repeated prescriptions (excluding antibiotics)
 0–1Ref.
 2–41.94 (1.76–2.14)
 5–72.38 (2.16–2.62)
 8 or more2.89 (2.54–3.28)
  1. BNF British National Formulary, CI confidence interval; Ref. reference group