The Impact of Patient Support Programs on Adherence to Disease-Modifying Therapies of Patients with Relapsing-Remitting Multiple Sclerosis in Germany: A Non-Interventional, Prospective Study

Abstract

Introduction: Disease-modifying therapies (DMTs) in multiple sclerosis (MS) are chronic therapies, and patients are likely to face challenges in adhering to DMT dosing regimens over time. DMT manufacturers offer patient support programs (PSPs) to increase adherence. PSPs are managed offerings typically encompassing nurse services, phone services, online resources, or mobile offerings. This study evaluated whether PSPs have a positive impact on adherence to DMTs among patients with mild-to-moderate relapsing-remitting multiple sclerosis (RRMS) in Germany, independent of the treatment duration on DMT. Methods: This was a non-interventional, prospective, cross-sectional, multi-center study with patient-reported outcomes. Patients reported their DMT adherence using patient adherence questionnaires at four visits during an observation period of 24 weeks; PSP participation for this period was reported at the last visit. The primary objective was to evaluate the impact of PSPs on adherence across different DMTs by comparing patients with PSP participation versus no participation; adherence was defined as not missing a single dose of DMT. Results: One hundred eighty-four patients were analyzed (mean age: 44.6 years; 73.4% female; mean time on DMT: 7.2 years). Adherence across DMTs was significantly higher for PSP participants (92.9%) compared with non-participants (61.8%) (P = 0.0197). The observed rate of PSP participation (7.6%) was significantly lower than reported in earlier studies (P < 0.0001); PSP awareness among patients analyzed was low (22.3%). Conclusion: We consider this study to have shown that PSPs have a positive impact on adherence to DMTs in MS, independent of the treatment duration on DMT. The majority of PSP participants also believe in this positive effect. PSP participation and patient awareness were low, and real-world adherence levels were found to be higher with self-injectable DMTs than with oral DMTs. In summary, physicians should actively advise patients with MS to participate in PSPs and, together with their patients, consider achievable real-world adherence under different DMTs when deciding MS treatment strategies.