Evaluation of risk factors for body weight increment in psoriatic patients on infliximab: a multicentre, cross-sectional study.

ABSTRACT

BACKGROUND: A significant weight gain has been reported in patients with psoriasis treated with anti-tumour necrosis factor-alpha agents. Among these patients, there are contradictory results about risk factors for weight gain. OBJECTIVE: Assessing risk factors for weight increment in psoriatic patients on infliximab (IFX). METHODS: This study was a 4-month, non-interventional, cross-sectional, multicentre study on adults with psoriasis performed in 19 French dermatological centres. All the patients who received IFX for at least 1 year were prospectively included, with retrospective analysis of data. Impact of sex, age, severity of the disease, cardiovascular and metabolic comorbidities, and previous and simultaneous systemic treatments on weight changes, was analysed. Weight gain was defined as an increment of more than 2% of baseline weight. RESULTS: Overall, 191 psoriatic patients (males 68.6%; mean age 46.9 years) were included. Mean weight gain was 1.6 kg (2.1%) after 1 year of IFX. Half (48.2%) suffered from a weight gain, and 9.9% from a weight increment of 10% or more. Baseline weight and Body Mass Index, and cardiovascular and metabolic comorbidities did not influence weight. Men (P=0.007) and patients with severe psoriasis (BSA, P=0.005) had a tendency to put on weight. Patients with a hospital dietary follow-up (P=0.01; OR=0.36 [0.16-0.79]) and patients on methotrexate (P=0.03; OR=0.41 [0.18-0.93]) during IFX treatment are thinner, in a multivariate analysis. CONCLUSION: Severe weight increment is frequent on IFX treatment, mainly in men, and patients with severe psoriasis. Dietary follow-up or simultaneous use of methotrexate could limit this weight increment.