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Treatment outcomes after methylphenidate in adults with attention-deficit/hyperactivity disorder treated with lisdexamfetamine dimesylate or atomoxetine

Authors Joseph A, Cloutier M, Guerin A, Nitulescu R, Sikirica V

Received 17 October 2015

Accepted for publication 19 January 2016

Published 24 March 2016 Volume 2016:10 Pages 391—405

DOI https://doi.org/10.2147/PPA.S98498

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Doris Leung

Peer reviewer comments 3

Editor who approved publication: Dr Johnny Chen

Alain Joseph,1 Martin Cloutier,2 Annie Guérin,2 Roy Nitulescu,2 Vanja Sikirica3

1Global HEOR and Epidemiology, Shire, Zählerweg, Zug, Switzerland; 2Analysis Group, Inc., Montreal, Quebec, Canada; 3Global HEOR and Epidemiology, Shire, Wayne, PA, USA

Purpose: To compare treatment adherence, discontinuation, add-on, and daily average consumption (DACON) among adults with attention-deficit/hyperactivity disorder receiving second-line lisdexamfetamine dimesylate (LDX) or atomoxetine (ATX), following methylphenidate.
Patients and methods: A retrospective cohort study using US commercial claims databases (Q2/2009–Q3/2013).
Results: At month 12, the LDX cohort (N=2,718) had a higher adherence level (proportion of days covered: 0.48 versus 0.30, P<0.001) and was less likely to discontinue (Kaplan–Meier estimate: 63% versus 85%, P<0.001) than the ATX cohort (N=674). There were no statistical differences in treatment add-on rates between cohorts (Kaplan–Meier estimate: 26% versus 25%, P=0.297). The LDX cohort had a lower DACON (1.10 versus 1.31, P<0.001) and was less likely to have a DACON >1 (adjusted odds ratio: 0.20, 95% confidence interval: 0.15–0.25, P<0.001) than the ATX cohort.
Conclusion: Adults with attention-deficit/hyperactivity disorder treated with LDX following methylphenidate had a higher treatment adherence and lower discontinuation and DACON relative to those treated with ATX following methylphenidate.

Keywords: ADHD, adult, adherence, lisdexamfetamine dimesylate, atomoxetine

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