Treatment adherence of cancer patients to orally administered chemotherapy: insights from a Greek study using a self-reported questionnaire.

Purpose: The aim of this prospective observational study was to investigate the patterns of treatment adherence to orally administered chemotherapy of patients being treated for cancer.

Methods: Patients were asked to participate in the survey during their visits to the study centers' pharmacists or doctors to obtain their oral medication from April 2008 until May 2009. The data were collected using a self-reported anonymous 7-page long questionnaire, which contained questions about their demographic profile, disease and treatment characteristics, and side-effects and adherence information, both intentional and nonintentional.