Weinstein 2006

Methods	Study design: randomised controlled trial Conducted in: community in Surrey, British Columbia Unit of randomisation: household Unit of analysis: mother and child Setting: mothers from Punjabi‐speaking (South Asian) community in Surrey, British Columbia, Canada Funded by: "The study was supported by the National Institute of Dental and Craniofacial Research grant" Duration of the study: 1 year (2004 to 2005)
Participants	Inclusion criteria: not reported Exclusion criteria: history of serious acute or chronic disease that would interfere with ability to examine the child, or with ability of the child and parent to participate fully Age at baseline: recruited when child was 6 to 18 months old N (controls baseline): not reported N (controls follow‐up): not reported N (interventions baseline): not reported N (interventions follow‐up): not reported Recruitment: Temples and fairs in the South Asian Punjabi speaking community (total participants: n = 240; study does not provide a breakdown of participant numbers in terms of intervention and control groups) Gender: not reported
Interventions	Intervention: pamphlet and video plus 45‐minute counselling, 2 follow‐up telephone calls within 6 weeks, 4 follow‐up calls within 20 weeks and postcards Control: education pamphlet and video Duration of intervention: not directly reported
Outcomes	Caries/New caries lesions (decayed or filled surfaces)
Implementation related factors	Theoretical basis: motivational Interviewing, behaviour change Resources for implementation: educational material, video, pamphlet, interviewing, postcards Who delivered the intervention: 3 trained local South Asian women who acted as counsellors PROGRESS categories assessed at baseline: yes PROGRESS categories analysed at outcome: not reported Outcomes related to harms/unintended effects: not reported Intervention included strategies to address diversity or disadvantage: not reported Economic evaluation: not reported
Notes	240 healthy infants 6 to 18 months of age were recruited; 205 (85%) total were analysed
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Participants were assigned to motivational counselling or to a health education group via a table of random numbers, after children had been stratified into 2 age groups (6 to 12 months and older than 12 months)
Allocation concealment (selection bias)	Unclear risk	Unclear
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Unclear
Selective reporting (reporting bias)	Low risk	Published report presents all expected outcomes of interest to the review
Other bias	Unclear risk	Unclear
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Unclear
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Unclear