Table 1b. Randomized controlled study of antihypertension therapy, in which the intervention under study had a positive effect on adherence but not on clinical end points.

Study	Type of intervention / case numbers (control vs intervention)	Effects on adherence and clinical end points
(21)	Brochure and two-monthly telephone consultations (focus: positive reinforcement, self-efficacy) n = 131 vs n = 125	After 12 months: Proportion of days with correct medication intake (by electronic registration of pack opening)* Blood pressure systolic (n.s.) and diastolic (n.s.), measurement taken in the context of usual primary care physician visits by practice nurse or practice assistant, using sphygmomanometer

^* Statistically significant effects in favor of the intervention group (as a rule p<0.05);

n.s.: non-significant