[Effectiveness of lifestyle modification programs for control of blood pressure: a non-randomized controlled trial in Komatsu, Japan].

Purpose: A non-randomized controlled trial was conducted to evaluate the effectiveness of three lifestyle modification programs to reduce blood pressure: individual counseling only; counseling using group dynamics; and individual support using mail.

Methods: We enrolled men and women ages 20-69 with a systolic blood pressure (SBP) of 130-159 mmHg and/or a diastolic blood pressure of 85-99 mmHg (high-normal or mild hypertension). Participants were assigned to one of 4 groups: individual counseling (n = 134); group counseling (n = 79); mailing support (n = 127); and controls (with usual care) (n = 178).