1. Ben-Zacharia, A, Adamson, M, Boyd, A, et al Impact of shared decision making on multiple sclerosis. Int J MS Care 2018; 6: 287–297.
Google Scholar | Crossref2. Kołtuniuk, A, Rosińczuk, J. Adherence to disease-modifying therapies in patients with multiple sclerosis. Patient Prefer Adherence 2018; 12: 1557–1566.
Google Scholar | Crossref | Medline3. Munsell, M, Frean, M, Menzin, J, et al An evaluation of adherence in patients with multiple sclerosis newly initiating treatment with a self-injectable or an oral disease-modifying drug. Patient Prefer Adherence 2017; 11: 55–62.
Google Scholar | Crossref | Medline4. Menzin, J, Caon, C, Nichols, C, et al Narrative review of the literature on adherence to disease-modifying therapies among patients with multiple sclerosis. J Manag Care Pharm 2013; 1: 19.
Google Scholar5. Halpern, R, Agarwal, S, Dembek, C, et al Comparison of adherence and persistence among multiple sclerosis patients treated with disease-modifying therapies: a retrospective administrative claims analysis. Patient Prefer Adherence 2011; 5: 73–84.
Google Scholar | Crossref | Medline | ISI6. INSSJP - Instituto Nacional de Servicios Sociales para Jubilados y Pensionados . https://www.pami.org.ar/historia (accessed 22 Mar 2020).
Google Scholar7. Marrie, RA, Cohen, J, Stuve, O, et al A systematic review of the incidence and prevalence of comorbidity in multiple sclerosis: overview. Mult Scler J 2015; 21: 263–281.
Google Scholar | SAGE Journals | ISI8. Fiest, KM, Fisk, JD, Patten, SB, et al Fatigue and comorbidities in multiple sclerosis. Int J MS Care 2016; 2: 96–104.
Google Scholar | Crossref9. Kroenke, K, Spitzer, RL, Williams, JBW. The patient health questionnaire-2: validity of a two-item depression screener. Med Care 2003; 41: 1284–1292.
Google Scholar | Crossref | Medline | ISI10. Learmonth, YC, Motl, RW, Sandroff, BM, et al Validation of patient determined disease steps (PDDS) scale scores in persons with multiple sclerosis. BMC Neurol 2013; 13: 37.
Google Scholar | Crossref | Medline | ISI11. Zanga, G, Caruso, D, Drzewiscki, E, et al. Adherence to treatment of multiple sclerosis in a health care program. Med 2021; 81: 311–317.
Google Scholar12. Peduzzi, P, Concato, J, Feinstein, AR, et al Importance of events per independent variable in proportional hazards regression analysis II. J Clin Epidemiol 1995; 48: 1503–1510.
Google Scholar | Crossref | Medline | ISI13. Dobbels, F, Van Damme-Lombaert, R, Vanhaecke, J, et al. Growing pains: non-adherence with the immunosuppressive regimen in adolescent transplant recipients. Pediatr Transplant 2005; 9(3): 381–390.
Google Scholar | Crossref | Medline | ISI14. Sikka, R, Xia, F, Aubert, R. Estimating medication persistency using administrative claims data. Am J Manag Care 2005; 11: 449–457.
Google Scholar | Medline | ISI15. Pagés, NVM . Methods to assess medication adherence. Ars Pharm 2018; 59: 163–172.
Google Scholar16. Hansen, K, Schüssel, K, Kieble, M, et al Adherence to disease modifying drugs among patients with multiple sclerosis in Germany: a retrospective cohort study. PLoS One 2015; 10: 1–12.
Google Scholar | Crossref17. Tan, H, Cai, Q, Agarwal, S, et al Impact of adherence to disease-modifying therapies on clinical and economic outcomes among patients with multiple sclerosis. Adv Ther 2011; 28: 51–61.
Google Scholar | Crossref | Medline | ISI18. Gromisch, ES, Turner, AP, Leipertz, SL, et al Risk factors for suboptimal medication adherence in persons with multiple sclerosis: development of an electronic health record-based explanatory model for disease-modifying therapy use. Arch Phys Med Rehabil 2020; 101(5): 807–814.
Google Scholar | Crossref | Medline19. Evans, C, Marrie, RA, Zhu, F, et al Adherence and persistence to drug therapies for multiple sclerosis: a population-based study. Mult Scler Relat Disord 2016; 8: 78–85.
Google Scholar | Crossref | Medline20. Fernández, O, Agüera, J, Izquierdo, G, et al Adherence to interferon β-1b treatment in patients with multiple sclerosis in Spain. PLoS One 2012; 7: 1–7.
Google Scholar | Crossref21. Thach, AV, Brown, CM, Herrera, V, et al Associations between treatment satisfaction, medication beliefs, and adherence to disease-modifying therapies in patients with multiple sclerosis. Int J MS Care 2018; 20: 251–259.
Google Scholar | Crossref | Medline22. Turner, AP, Williams, RM, Sloan, AP, et al Injection anxiety remains a long-term barrier to medication adherence in multiple sclerosis. Rehabil Psychol 2009; 54: 116–121.
Google Scholar | Crossref | Medline | ISI23. Burks, J, Marshall, TS, Ye, X. Adherence to disease-modifying therapies and its impact on relapse, health resource utilization, and costs among patients with multiple sclerosis. Clin Outcomes Res 2017; 9: 251–260.
Google Scholar | Crossref | Medline | ISI24. Morillo Verdugo, R, Herráiz, ER, Olmo, RF, et al Adherence to disease-modifying treatments in patients with multiple sclerosis in Spain. Patient Prefer Adherence 2019; 13: 261–272.
Google Scholar | Crossref | Medline25. Li, P, Ladage, VP, Berger, J, et al Disease-modifying therapy adherence and associated factors in a national sample of medicare patients with multiple sclerosis. Value Heal 2019; 23: 328–334.
Google Scholar | Crossref | Medline26. Bayliss, EA, Steiner, JF, Fernald, DH, et al Descriptions of barriers to self-care by persons with comorbid chronic diseases. Ann Fam Med 2003; 1: 15–21.
Google Scholar | Crossref | Medline27. Tremlett, H, Van Der Mei, I, Pittas, F, et al Adherence to the immunomodulatory drugs for multiple sclerosis : contrasting factors affect stopping drug and missing doses. Pharmacoepidemiol Drug Saf 2008; 17(6): 565–576.
Google Scholar | Crossref | Medline | ISI28. Bruce, JM, Hancock, LM, Arnett, P, et al Treatment adherence in multiple sclerosis: association with emotional status, personality, and cognition. J Behav Med 2010; 3(33): 219–227.
Google Scholar | Crossref29. Carnero Contentti, E, Giachello, S, Correale, J. Barriers to access and utilization of multiple sclerosis care services in a large cohort of Latin American patients. Mult Scler J 2020; 27(1): 117–129.
Google Scholar | SAGE Journals30. Bazargan, M, Smith, J, Yazdanshenas, H, et al Non-adherence to medication regimens among older African-American adults. BMC Geriatr 2017; 17: 1–12.
Google Scholar | Crossref | Medline31. Devonshire, V, Lapierre, Y, Macdonell, R, et al The global adherence project (GAP): a multicenter observational study on adherence to disease-modifying therapies in patients with relapsing-remitting multiple sclerosis. Eur J Neurol 2011; 18: 69–77.
Google Scholar | Crossref | Medline | ISI32. Frahm, N, Hecker, M, Zettl, UK. Polypharmacy among patients with multiple sclerosis: a qualitative systematic review. Expert Opin Drug Saf 2020; 19: 139–145.
Google Scholar | Crossref | Medline33. Treadaway, K, Cutter, G, Salter, A, et al Factors that influence adherence with disease-modifying therapy in MS. J Neurol 2009; 256: 568–576.
Google Scholar | Crossref | Medline | ISI34. Río, J, Porcel, J, Téllez, N, et al Factors related with treatment adherence to interferon β and glatiramer acetate therapy in multiple sclerosis. Mult Scler 2005; 11: 306–309.
Google Scholar | SAGE Journals | ISI35. McKay, KA, Evans, C, Fisk, JD, et al Disease-modifying therapies and adherence in multiple sclerosis: comparing patient self-report with pharmacy records. Neuroepidemiology 2017; 1: 124–130.
Google Scholar | Crossref36. Von Gaudecker, JR. Factors affecting the adherence to disease-modifying therapy in patients with multiple sclerosis. J Neurosci Nurs. 2018; 50: 302.
Google Scholar | Crossref | Medline37. Tarrants, M, Oleen-Burkey, M, Castelli-Haley, J, et al The impact of comorbid depression on adherence to therapy for multiple sclerosis. Mult Scler Int 2011; 2011: 1–10.
Google Scholar | Crossref38. Carnero Contentti, E, Pettinicchi, JP, López, PA, et al Access and unmet needs to multiple sclerosis care in a cohort of Argentinean patients. Mult Scler Relat Disord 2019; 33: 88–93.
Google Scholar | Crossref | Medline39. O’Toole, J, Sinclair, M, Leder, K. Maximising response rates in household telephone surveys. BMC Med Res Methodol 2008; 8: 1–5.
Google Scholar | Crossref | Medline40. Glass, DC, Kelsall, HL, Slegers, C, et al A telephone survey of factors affecting willingness to participate in health research surveys. BMC Public Health 2015; 15: 1.
Google Scholar | Crossref | Medline | ISI