Background: Patient self-report is a practical method for measuring adherence, but little is
known about its optimal use. Objectives: To examine the retest reliability and predictive
validity of 3 different types of self-report adherence measures among patients with common
chronic illnesses. Research Design: Correlation and regression analyses of data from an
ongoing randomized controlled trial. Subjects: Patients (N= 415) aged≥ 40 years recruited
from a primary care network with arthritis, asthma, chronic lung disease, congestive heart …