Impact of workplace health services on adherence to chronic medications.

Objective: To test the association between integrated workplace health and pharmacy care and medication adherence.

Study Design: Adherence rates for commonly used chronic disease medications were compared in a retrospective, non-case-controlled study of 4476 workplace-treated patients versus 13,134 community-treated patients.

Methods: Pharmacy claims data were used to compute the medication possession ratio for patients who received care in different settings for 20 therapeutic classes.