Dutta 1988.

Methods	RCT Generation of allocation sequence: random‐numbers table Allocation concealment: not reported Blinding: unclear Inclusion of participants in analysis: > 90% Duration: not stated
Participants	Number of participants: 105 enrolled Inclusion criteria: age 4 months to 4 years; males; acute watery diarrhoea; presence of severe dehydration Exclusion criteria: presence of systemic illness; antibiotic intake before admission
Interventions	Glucose ORS: 33 participants. Rice ORS: 35 participants. Pop rice ORS: 37 participants.
Outcomes	Total stool output in first 24 hours. Total stool output from randomization to discharge. Duration of diarrhoea. Number of participants with hypo‐ and hypernatraemia.
Glucose‐based ORS osmolarity	≥ 310 mOsm/L
Setting	Hospital‐based trial Location: Calcutta, India
Notes	Results of rice ORS and pop rice ORS were combined both for the continuous and dichotomous outcomes, and compared with glucose ORS. These were all reported as rice‐based ORS
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	RCT: random‐numbers table
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not stated
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Low risk	The trial included all randomized participants in the analysis
Selective reporting (reporting bias)	Low risk	The trial reported over 90% of the included participants in the final analysis
Other bias	Unclear risk	We did not detect any other sources of bias