Toassi 2002

Methods	Study design: before‐and‐after study (2 active arms) Conducted in: Brazil Unit of randomisation: individual Unit of analysis: individual Setting: schools, Santa Teresa Funded by: not disclosed or reported Duration of the study: Study commenced in 1999 ‐ end period not reported
Participants	Inclusion criteria: not reported Exclusion criteria: not reported Age at baseline: between 5 and 14 years Total at baseline: 135 N (controls baseline): 61 N (controls follow‐up): 61 N (interventions baseline): 74 N (interventions follow‐up): 74 Recruitment: not reported Gender: 59% male, 41% female
Interventions	Intervention: dental caries preventive programme Delivery of toothbrushes and toothpaste every 3 months, daily toothbrushing in schools, weekly mouthwash fluoride solution at 0.2%, quarterly application of fluoride gel on the toothbrush and quarterly health education and motivational interviewing Control: dental caries preventive program but no motivational interviewing Duration of intervention: Group A received 1 motivational session, and Group B received 4 motivational sessions (no specific time period reported)
Outcomes	Plaque index, gingival bleeding index
Implementation related factors	Theoretical basis: pedagogical motivational approaches Resources for implementation: educational materials, toothbrushes, toothpaste, audiovisual resources Who delivered the intervention: unclear PROGRESS categories assessed at baseline: income 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
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Students were randomly divided into 2 groups
Allocation concealment (selection bias)	Unclear risk	Unclear
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Unclear
Selective reporting (reporting bias)	Unclear risk	Unclear
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