Table 2. Model reporting the incident rate ratio (IRR) comparing prescribing of azithromycin in 2020 with 2019. Taking the variables in the model into account there was a 22% increase, with people aged ≥65 years, female sex, the most deprived, northern regions and people with lower respiratory tract infections and upper respiratory tract infections all being associated with a higher rate of prescribing.
Azithromycin prescribing ratescomparing 2020 with 2019IRRLowerUpperP
95% CI95% CI
Year 2020 (reference level: 2019)<0.0001
Age band (reference level: 0–15)
65 4.774.584.98<0.0001
 Sex (reference level: F)0.910.880.93<0.0001
IMD quintile (reference level: Q1, most deprived)
 Q5 (least deprived)0.670.640.70<0.0001
NHS region (reference: London)
The Midlands and East<0.0001
 North East and Yorkshire1.471.401.54<0.0001
 North West1.131.081.18<0.0001
 South East0.940.890.98<0.0001
 South West0.720.690.76<0.0001
Respiratory disease
 LRTI count1.00511.00431.0058<0.0001
 URTI count1.00301.00261.0035<0.0001
 ILI count1.00170.99821.00530.3400
  • ILI = influenza-like illness. IMD = Index of Multiple Deprivation. LRTI = lower respiratory tract infections. URTI = upper respiratory tract infections.