Macfarlane 2002.

Methods	RCT unit of allocation: patient unit of analysis: patient power calculation: done concealment of allocation: not clear follow up of patients: done blinded assessment of outcome: done baseline measurement: not applicable reliable primary outcome measure: not clear protection against contamination: not applicable analysis appropriate: yes
Participants	212 adult patients with acute bronchitis from 3 general practices in Great Britain who were felt by the physician to desire but not require antibiotics
Interventions	1. Given standard verbal reassurance and prescription for antibiotics to use if they got worse along with leaflet outlining why antibiotics were not necessary for treatment of acute bronchitis 2. Given standard verbal reassurance and prescription for antibiotics to use if they got worse along with blank leaflet
Outcomes	Professional practice: None Patient: Proportion of patients who filled prescription Reconsultation for same symptoms in next month
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Unclear risk	B ‐ Unclear