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Adherence and persistence to ropinirole, pramipexole, and gabapentin in patients with newly diagnosed restless legs syndrome.
Sleep Medicine 2018 April
STUDY OBJECTIVES: The objective of this study is to assess adherence and persistence of ropinirole, pramipexole, and gabapentin; to investigate factors associated with non-adherence and non-persistence in restless legs syndrome (RLS) patients.
METHODS: We used the 2008-2014 Marketscan® Research Databases to conduct a retrospective data analysis. The study included newly diagnosed RLS patients who initiated ropinirole, pramipexole, or gabapentin therapy. During 365 days of follow-up, mean medication possession ratios (MPRs) for adherence and the proportion of adherent users were calculated. The mean persistence (time to discontinuation) and the proportion of persistent users were also assessed during the same follow-up period. Factors associated with non-adherence and non-persistence were analyzed using multivariate logistic regression.
RESULTS: This study included 5163 ropinirole, 3380 pramipexole, and 1353 gabapentin users. The mean MPRs for ropinirole, pramipexole, and gabapentin were 0.52, 0.52, and 0.48, respectively. The proportions of adherent users were 33.2%, 34.6%, and 27.4%, respectively. Mean time to treatment discontinuation was 158 days, 158 days, and 145 days, respectively. The proportions of persistent users at 365 days were 25.0%, 25.8%, and 20.6%, respectively. Younger age, higher number of concomitant medications, and gabapentin use (vs. ropinirole or pramipexole use) were positively associated with non-adherence and non-persistence. Additionally, retail pharmacy use (vs. mail order pharmacy use) and use of benzodiazepines were positively associated with non-adherence.
CONCLUSION: Adherence and persistence to ropinirole, pramipexole, and gabapentin were low in newly diagnosed RLS patients during 365 days of follow-up. Certain patient characteristics were predictors of non-adherence and non-persistence.
METHODS: We used the 2008-2014 Marketscan® Research Databases to conduct a retrospective data analysis. The study included newly diagnosed RLS patients who initiated ropinirole, pramipexole, or gabapentin therapy. During 365 days of follow-up, mean medication possession ratios (MPRs) for adherence and the proportion of adherent users were calculated. The mean persistence (time to discontinuation) and the proportion of persistent users were also assessed during the same follow-up period. Factors associated with non-adherence and non-persistence were analyzed using multivariate logistic regression.
RESULTS: This study included 5163 ropinirole, 3380 pramipexole, and 1353 gabapentin users. The mean MPRs for ropinirole, pramipexole, and gabapentin were 0.52, 0.52, and 0.48, respectively. The proportions of adherent users were 33.2%, 34.6%, and 27.4%, respectively. Mean time to treatment discontinuation was 158 days, 158 days, and 145 days, respectively. The proportions of persistent users at 365 days were 25.0%, 25.8%, and 20.6%, respectively. Younger age, higher number of concomitant medications, and gabapentin use (vs. ropinirole or pramipexole use) were positively associated with non-adherence and non-persistence. Additionally, retail pharmacy use (vs. mail order pharmacy use) and use of benzodiazepines were positively associated with non-adherence.
CONCLUSION: Adherence and persistence to ropinirole, pramipexole, and gabapentin were low in newly diagnosed RLS patients during 365 days of follow-up. Certain patient characteristics were predictors of non-adherence and non-persistence.
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