Factors associated with hospitalization due to COVID-19 in patients with psoriasis: Insights from a global registry

ABSTRACT

Psoriasis is a common immune-mediated inflammatory skin disease with frequent multimorbidity, and immunosuppressants are the mainstay of treatment in moderate-to-severe disease. An understanding of the impact of COVID-19 on individuals with psoriasis and the effect of psoriasis therapies on the course of COVID-19 is urgently required to inform clinical decision-making. This study sought to characterize the clinical course of COVID-19 in patients with psoriasis and to identify factors associated with hospitalization. Clinicianreported cases of confirmed or suspected COVID-19 in psoriasis were collected via an international online registry. Multivariable-adjusted logistic regression identified factors associated with hospitalization. Patient risk-mitigating behaviours were characterized using an independent global selfreport registry. In total, 334 clinician-reported cases (median age 50 years, 62% male, median body mass index 28 kg m-2, 85% white) from 22 countries [most frequently, the U.K. (35%), Italy (22%) and Spain (16%)] were available between 27 March and 20 June 2020. Altogether, 245 (73.3%) patients were receiving a biologic, 54 (16.2%) a nonbiologic and 31 (9.3%) no systemic treatment. Overall, 311 (93.1%) achieved a full recovery, 71 (21.2%) were hospitalized and nine (2.7%) died. Risk factors associated with hospitalization were older age [adjusted odds ratio (aOR) 1.71, 95% confidence interval (CI) 1.26-2.32], male sex (aOR 2.37, 95% CI 1.11-5.04) and nonwhite ethnicity (aOR 3.40, 95% CI 1.27-9.11), in addition to chronic lung disease (aOR 4.37, 95% CI 1.62-11.74) and hypertension (aOR 2.23, 95% CI 1.05-4.74). Reduced risk of hospitalization was associated with use of a biologic (aOR 0.42, 95% CI 0.18-0.98) vs. nonbiological systemic therapy. There was no difference in risk of hospitalization between classes of biologics. An independent selfreport psoriasis registry (1167 patients from 39 countries) suggested increased social isolation (76% vs. 66%;P < 0.05) but similar nonadherence to medication (18% vs 22%) in patients receiving biologics vs. nonbiological systemic treatments. In this international moderate-to-severe psoriasis case series, most patients fully recovered from COVID-19;older age, being male and being of nonwhite ethnicity increased risk of hospitalization. Use of biologics, when compared with nonbiological systemic therapies, was associated with reduced risk of hospitalization;however, this requires further study owing to potential selection bias and unmeasured confounding such as a difference in risk-mitigating behaviours.