Wei 2003.

Methods	Study design: RCT Conducted in China Number of centres: 1 Recruitment period: unspecified Funding source: unspecified
Participants	Inclusion criteria: clinical demonstration of hyperaemic OLP, pathological examination confirmed the diagnosis of OLP, history of OLP for ≥ 3 months Exclusion criteria: OLP did not locate in the buccal mucosa, with other oral mucosa diseases or systematic diseases, first‐onset OLP or history < 3 months, already taking local or systematic therapy in the past 3 months, OLP after the treatment of orthodontics and metallic full crown Group A: randomised 37; analysed 37 Group B: randomised 20; analysed 20
Interventions	Group A: alternative use of mycostatin paste and dexamethasone paste (twice daily each) for 6 weeks Group B: dexamethasone paste (4 times daily) for 6 weeks
Outcomes	Clinical score (4‐grade score)
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of sequence generation not described by translator.
Allocation concealment (selection bias)	Unclear risk	Insufficient information to permit judgement.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Quote: "Double blind."
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Quote: "Double blind."
Incomplete outcome data (attrition bias) All outcomes	Low risk	No missing data. All randomised participants included in analysis.
Selective reporting (reporting bias)	Unclear risk	Insufficient information to permit judgement.
Other bias	Low risk	No other sources of bias identified.