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Persistence of treatment with biologics for patients with psoriasis: a real-world analysis of 16 545 biologic-naïve patients from the French National Health Insurance database (SNIIRAM).

BACKGROUND: Long-term clinical effectiveness of biologics in psoriasis is needed.

OBJECTIVES: We aimed to assess the long-term persistence of biologics used to treat psoriasis in a real-life setting.

METHODS: All adults with psoriasis having been registered in the French National Health Insurance database (SNIIRAM) between 2008 and 2016 were eligible for inclusion. Psoriasis was defined as the fulfilment of at least two prescriptions for topical formulations of a vitamin D derivative within a 2-year period. The study population comprised biologic-naïve patients, i.e. those with a first prescription of etanercept, infliximab, adalimumab or ustekinumab. Persistence of treatment with a biologic was defined as the time interval between initiation and discontinuation.

RESULTS: In this nationwide population-based cohort, 16 545 out of 874 549 patients with psoriasis were biologic-naïve (mean age 48·6 years; males 57·3%, mean follow-up 3·6 years). The mean ± SD length of follow-up for biologic-naïve patients was 3·6 ± 2·4 years. There were 9988 treatment discontinuations. Kaplan-Meier survival analyses revealed a persistence rate of 61·9% for the first, 33·3% for the third and 22·6% for the fifth year. Ustekinumab had a higher persistence rate than the other biologics. This finding should be interpreted with caution, in view of differences in administration between the biologics. About 85% of patients, having discontinued their first biologic, resumed systemic treatment of some type in the following year (biologics in 85% of cases).

CONCLUSIONS: Our data suggest that biologics are less effective than physicians have been led to believe in a real-life, nonselected population. Further, long-term disease control requires several courses of different biologics.

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