Table 3

Results of subgroup and sensitivity analyses for antibiotic prescribing at the index consultation

Subgroup and sensitivity analysesNumber of studiesWeighted estimates, % (95% CI)Heterogeneity test
Subgroup analyses
1. Study design
  Parallel-group RCTs40.91 (0.82 to 1.01)I2 = 13%, P = 0.33
  Cluster RCTs30.58 (0.50 to 0.67)I2 = 0%, P = 0.99
  OSs60.74 (0.65 to 0.85)I2 = 76%, P<0.001
2. Location of RTIs
  Upper RTIs30.68 (0.54 to 0.84)I2 = 76%, P = 0.01
  Lower RTIs50.70 (0.60 to 0.83)I2 = 63%, P = 0.03
Sensitivity analyses
European studies120.73 (0.66 to 0.82)I2 = 76%, P<0.001
English language studies110.73 (0.64 to 0.82)I2 = 76%, P<0.001
  • OS = observational study. RCT = randomised controlled trial. RTI = respiratory tract infection.