Jin 2010.

Methods	"Randomly allocated patients" mentioned but the randomisation method used was not described. Parallel‐group design. No blinding. The study was conducted in Hebei Province TCM hospital, China
Participants	68 participants were randomly allocated to 2 groups; 34 in each group
Interventions	Group 1 was given the doctor‐prepared Qinfei Jiedu decoction Group 2 was given oseltamivir
Outcomes	1. Change in sore throat 2. Change in cough, sputum
Notes	The study data were not analyzed because unfeasible methods were used to assess the effects and the reporting was unclear
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Not mentioned
Allocation concealment (selection bias)	High risk	Not used
Blinding (performance bias and detection bias) All outcomes	High risk	Not used
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not mentioned
Other bias	High risk	The decoction was self prepared by the trialist, so there was high risk of conflict of interest
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not used
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not used