title: AVAPROMISE: A randomized clinical trial for increasing adherence through behavioural modification in essential hypertension.
abstract: BACKGROUND
  Patients with hypertension often do not adhere to their medications.
  
  
  OBJECTIVE
  To improve medication adherence in patients with essential hypertension by modifying their behaviours.
  
  
  METHODS
  From general practice settings, 4864 patients with essential hypertension were recruited and randomly assigned to receive the angiotensin receptor blocker irbesartan (Avapro) with (intervention group) or without (nonintervention group) a behavioural modification program (Avapromise) based on a model of change. Patients were followed up for 12 months. Patients were subgrouped based on their stage of change in the behavioural change continuum, and the intervention was tailored to address the needs of the particular subgroup. The primary efficacy measure was rate and time to discontinuation with irbesartan.
  
  
  RESULTS
  At the end of the study, there was no significant difference in the discontinuation rates between the intervention (25.4%, 95% CI 23.7 to 27.2) and nonintervention (25.5%, 95% CI 23.8 to 27.3) groups (P=0.94). The time to discontinuation (P=0.87) and the extrapolated rate of discontinuation estimated from the Kaplan-Meir curve (intervention 23.1%, 95% CI 21.3 to 24.8; nonintervention 23.5%, 95% CI 21.8 to 25.3) were not different between the groups.
  
  
  CONCLUSIONS
  This behavioural modification intervention based on a model of change was not efficacious at increasing rates of adherence in patients with essential hypertension in this setting. More individualized interventions may be required to increase adherence in this population.
authors: Centre Hospitalier de l'Universite de Montreal, University of Montreal, Montreal, Quebec;
authors: Pavel
authors: P
authors: Hamet
authors: Norman
authors: N
authors: Campbell
authors: Greg
authors: G
authors: Curnew
authors: Clive
authors: C
authors: Eastwood
authors: Ashish
authors: A
authors: Pradhan