Ladegaard 1999 DEN.

Methods	Cluster‐RCT Allocation sequence: unclear Allocation concealment: unclear Blinding: none Inclusion of participants in the analysis: unclear Length of follow‐up: 4 months Cluster‐adjustment method: not adjusted
Participants	Number: 8 day‐care centres, with 475 children (212 intervention, 263 control) Inclusion criteria: not stated Exclusion criteria: not stated Age: < 6 years
Interventions	Intervention (see Table 5 for detailed description): Small group practical demonstration Control: No intervention
Outcomes	Diarrhoeal rates
Notes	Location: Odense, Denmark Duration: 6 months
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Kind of unclear whether they were divided in two groups manually and then randomized or randomized stratified. " The 8 institutions were allocated based on likeliness and randomised to intervention or control with 4 institutions in each".
Allocation concealment (selection bias)	Unclear risk	Randomization not described in detail.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not described.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	One institution had not written down attendance for the children 0‐2years. There were 212 children in the intervention group and 263 in the control group but no account over what happened to the children over time.
Selective reporting (reporting bias)	Low risk	No evidence of outcomes not presented.
Other bias	Low risk	None observed.