Hashemian 2012

Methods	Study design: cluster‐randomised controlled study Conducted in: Iran Setting: Iranian senior high school Duration of the study: April 2010 to November 2010
Participants	Inclusion criteria: not reported Exclusion criteria: not reported Age at baseline: not reported N (control baseline): 153 N (controls follow‐up): not reported N (intervention baseline): 153 N (intervention follow‐up): not reported
Interventions	Intervention: The impact of the intervention programme was assessed after 24 weeks, and the gingival index of each student was recorded for both groups before and after intervention. Appropriate instruments and the intervention programme were designed with the purpose of improving stages of interdental cleaning behaviour, perceived benefits and self efficacy, as well as reducing perceived barriers and gingival index Control: not reported Duration of intervention: 24 weeks
Outcomes	Gingival index
Notes