Risk Factors Affect Long-Term Compliance to Coumadin Treatment (Self-Reporting)

Abstract Low compliance to a prescribed Coumadin treatment can result in negative health outcomes. In this study we aimed to evaluate risk factors affecting patient compliance to Coumadin. For this purpose, two study phases were performed: Phase 1: a retrospective eight-year follow-up of databases from health care services; and Phase 2: a cross-sectional study with telephone interviews. A Total Compliance Index was constructed using the number of Coumadin purchases (40%), international standardised ratio (INR) tests (40%), and average INR values (20%). Multiple models for the Total Compliance Index were constructed using socio-demographic, treatment-related, and health care utilisation vari…