Itaya 2011.

Study characteristics
Methods	Study design: parallel RCT Number of centers/setting: not reported Country: Japan Dates of the study: not reported
Participants	Total number of participants randomized: 51 silodosin group: 16 control group: 16 naftopidil group: 19 Age: not reported Sex (M/F): all male Stone location: silodosin group: 13 upper ureteral control group: 13 upper ureteral naftopidil group: 15 upper ureteral Stone size: not reported Inclusion criteria: males with ureteral stones who underwent SWL Exclusion criteria: not reported
Interventions	Treatment group: silodosin 0.8 mg/day for not reported standard care: pain relieving therapy Control group: control Comparator group: naftopidil 75 mg/day SWL: not reported
Outcomes	Stone clearance, stone free rate How measured: x‐ray Time point measured: 7, 14, 21, 28 days Subgroups: stone location (upper ureteral)
Funding sources	Not reported
Declarations of interest	Not reported
Notes	Language of publication: English Type of publication: abstract only Date of contact attempt with study authors: none Contact status: N/A
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comment: method of random sequence generation unclear.
Allocation concealment (selection bias)	Unclear risk	Comment: unclear whether allocation was concealed.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comment: no placebo use described; participants likely not blinded.
Blinding of outcome assessment (detection bias) Investigator assessed; susceptible (stone clearance, time to stone clearance)	High risk	Comment: outcome assessors likely not blinded.
Blinding of outcome assessment (detection bias) Investigator assessed; susceptible (major adverse events)	High risk	Comment: outcome assessors likely not blinded.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Comment: unable to assess what proportion of randomized participants were included in outcome analyses.
Selective reporting (reporting bias)	Unclear risk	Comment: no protocol available.
Other bias (additional SWL sessions)	Unclear risk	Comment: unclear whether > 1 SWL session was administered.