Table 1.

Stages in the STAMPP trial

Stage	Description
Recruitment of schools	Schools in Glasgow Local Authority (n=30) were recruited as a complete group following negotiations with education services. Schools in Inverclyde (n=5) were recruited following a meeting with the head teachers/principals to discuss the practicalities of the trial. Schools in Northern Ireland (n=70) were recruited individually in the following process: letter of information; follow-up telephone call; individual meeting with head teacher/principals; agree yes/no.
Training of teachers	One-day training events were held in each study site before both phases of delivery of the classroom component. Training for the following academic year (from September onwards) took place in the preceding June. Training involved lectures on alcohol (eg, effects of alcohol use, prevalence rates and risk and protective factors for alcohol use), sharing experiences on previous delivery of the programme and skills rehearsal for each of the SHAHRP lessons. Training involved examination of each of the SHAHRP lessons that covered: myths about alcohol; units of alcohol; reasons why people do/don’t drink; alcohol and the body; consequences of ‘levels’ of drinking; blood alcohol concentration; social and personal harms; alcohol policy; alcohol and the media; advice for teenagers; a ‘night out’; pressures faced by young drinkers; and scenario-based discussion. Each lesson was scheduled to last one lesson period (approximately 40 min) and delivered once a week. Teachers were provided with support materials (CD-ROMS and workbooks) at each training session to help implement the lessons.
Intervention period	The intervention period was September–November in both academic years. Phase one involved six lessons and phase two involved four lessons. Schools were asked to complete all lessons within the 3-month delivery window in both phases. The Parental Brief Intervention coincided with delivery of phase two when the children were in their third year of secondary school and took place in the evening on intervention school premises. The intervention included a brief presentation on the UK Chief Medical Officers’ guidelines on alcohol use by young people and a discussion on setting family rules on alcohol. All intervention student parents, regardless of whether they had attended the evening or not, were mailed a leaflet that reinforced these points a few weeks after the parental session. Final data collection for the primary outcome took place 1 year after all elements of the intervention had been delivered.

SHAHRP, School Health and Alcohol Harm Reduction Project; STAMPP, Steps Towards Alcohol Misuse Prevention Programme.