Original article Assessing the role of patient support services on adherence rates in patients using glatiramer acetate for relapsing-remitting multiple sclerosis

Objective: To assess predictors of achievement of 80% Medication Possession Ratio (MPR) in patients receiving manufacturer-provided self-management services for relapsing-remitting multiple sclerosis (RRMS) patients taking glatiramer acetate (Copaxone). Methods: De-identified patient records were selected for study inclusion if patients had been (1) continuously enrolled in one or more aspects of the self-management program for a minimum of 24 months and had adherence measured by MPR between the values of zero and one. Baseline patient univariate measures were assessed using chi-squared statistics for categorical variables and Analysis of Variance (ANOVA) for continuous variables. Bivariate logistic regression models were used to assess predictors of 80% MPR. Results: A total of 5825 patients met the study inclusion criteria. About 70% of patients received manufacturerprovided injection training and 75% were eligible for, and utilized, copayment assistance; 74.3% of patients accessing sponsor provided support achieved a desired MPR of greater than or equal to 80%. Patients were 40% more likely to reach goal if injection training was provided by the manufacturer (OR ¼ 1.435; 95% CI ¼ 1.258–1.636) and were 30.6% more likely to achieve goal when eligible patients utilized copayment assistance programs (OR ¼ 1.306; 95% CI ¼ 1.109–1.570). Patients reinitiating treatment were at risk of lower adherence rates (OR ¼ 0.605; CI ¼ 0.476–0.769) compared to those who were new to therapy.