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Background: Teriflunomide 14 mg (Aubagio®) is a once-daily, oral drug approved for the treatment of relapsing forms of multiple sclerosis (MS). While the efficacy and safety of teriflunomide have been thoroughly characterised across an extensive clinical program, we were interested in studying performance of the drug with respect to quality-of-life (QoL) outcomes in persons with MS in a real-world setting., Methods: Teri-LIFE was a prospective, open label, non-interventional, observational, multi-centre study that enrolled 200 teriflunomide-treated patients from three Nordic countries. The primary outcome measure changes in patient-reported QoL over 24 months as measured by the Short Form-36 (SF-36) questionnaire. Secondary endpoints included clinical efficacy, fatigue, safety, treatment satisfaction (Treatment Satisfaction Questionnaire for Medication version 1.4 (TSQM-1.4)), treatment adherence, and health economic outcomes. Most assessments were made at baseline and then at 6-monthly intervals., Results: Overall, changes in SF-36 scores from baseline to last visit indicated a stable QoL during treatment with teriflunomide for up to 24 months. Relapse activity decreased during the study compared to the pre-baseline period (p<0.001), patient-reported disability increased marginally, and no substantial change was seen in fatigue scores. The mean scores for TSQM domains increased nominally though not significantly from Month 6 to Month 24. The convenience and side effects TSQM domains recorded the highest median scores, indicating the acceptability of oral teriflunomide in this cohort. This was reflected in a generally high treatment adherence and decreased healthcare utilization during the study period. Some differences were seen between treatment-naïve and previously treated patients, likely reflecting different patient demographics and disease status at study entry, along with different treatment expectations., Conclusion: Teri-LIFE offers a reliable snapshot of QoL, efficacy, safety, and health economic outcomes in persons with relapsing MS treated with teriflunomide in routine clinical practice in Nordic countries The results were consistent with previous clinical trials and real-world studies., (Copyright © 2022. Published by Elsevier B.V.)