Delmont 1981.

Methods	RCT
Participants	60 IBS patients Setting unclear Mean age 57 years 67% female
Interventions	Spasmolytic pinaverium tds for 30 days
Outcomes	abdominal pain, dichotomous global assessment, dichotomous
Notes	unclear setting No run‐in
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described
Allocation concealment (selection bias)	Unclear risk	Not described
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Double blind ‐ procedures not described
Incomplete outcome data (attrition bias) All outcomes	Low risk	3 drop‐outs
Selective reporting (reporting bias)	Low risk	Expected outcomes were reported
Other bias	Low risk	The study appears to be free of other sources of bias