Skinner 2000.

Methods	Randomised trial conducted in Australia
Participants	Participants: school‐going girls and boys (class 7) Number per group: 458 students in intervention group and 467 students in control group Total number enrolled: 66 intervention schools (7588 students) AND 69 control schools (9823 students) aged 11–13 years Study population: Melbourne metropolitan secondary schools school‐going children in class 7
Interventions	Intervention: complex hepatitis B education Description: health education kit with 4‐lesson structured multi‐component intervention that included: resource fact sheet and assessment; an information video and questions designed to engage an adolescent audience; small group discussion; an activity to locate resource information on the Internet. The intervention group received the health educational in addition to the usual government student and parent information brochures. Duration: 1 year Comparison: simplified hepatitis B education Description of comparison: brochures were 1‐page folded coloured leaflets, outlining in simple terms, the risks of hepatitis B and benefits and adverse effects of vaccination. Vaccine target: hepatitis B vaccine Disease targeted: hepatitis B Number of doses: 3 doses
Outcomes	Hepatitis B vaccine uptake Hepatitis B vaccine knowledge and attitude
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random allocation to intervention and control was done.
Allocation concealment (selection bias)	Unclear risk	No description.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	The outcome is an objective measure.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	The outcome is an objective measure.
Incomplete outcome data (attrition bias) All outcomes	Low risk	All schools recruited were included in the analysis on an intention‐to‐treat basis.
Selective reporting (reporting bias)	Unclear risk	No description.
Other bias	Low risk	No evidence of other bias.