Per protocol ( PP ) analysis , including only participants who accessed the interventions and also reported accessing additional outside interventions during the trial , showed that about 75 % of extended self-help participants moved from probable dependence , harmful or hazardous use to lower alcohol use levels at 3 - and 6 - and 12-month follow-ups , compared to about 40-60 % of brief intervention users and controls who accessed extra help ( p < 0.05 ) .