Lee 2003.

Methods	Study design: parallel, 2‐arm RCT Time frame: not reported Duration of follow‐up: combination group was followed up for 28 months, ARB group was followed up for 30 months
Participants	Setting: not reported Country: Korea Inclusion criteria: IgAN and proteinuria ≥ 1.0 g/d and SCr (SCr) ≤ 1.3 mg/dL Number (analysed/randomised): treatment group (not reported/12); control group (not reported/11) Mean age ± SD (years): treatment group (32.3 ± 8.4); control group (33.7 ± 10.4) Sex (M/F): treatment group (5/7); control group (5/6) Exclusion criteria: not reported
Interventions	Treatment group: Combination therapy of steroid: daily high‐dose for 6 months ARB Control group: ARB alone therapy Co‐interventions Not reported
Outcomes	24h proteinuria Complete remission Decline of renal function
Notes	Korean paper; abstract in English Trials registration identification number: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Insufficient information to permit judgement
Allocation concealment (selection bias)	Unclear risk	Insufficient information to permit judgement
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Selective reporting (reporting bias)	Unclear risk	Insufficient information to permit judgement
Other bias	Unclear risk	Insufficient information to permit judgement