银屑病性关节炎（PsA）是一种需要专门护理的慢性多系统骨关节疾病。大多数巴西人依赖于巴西公共卫生系统（Sistema Único de Saúde，简称SUS）提供的公共医疗保健。本研究旨在描述SUS随访中PsA患者的流行病学特征，重点关注疾病的发病率和患病率、合并症和住院情况。我们使用Techtrials Disease Explorer®平台和与PsA相关的医学代码，从2008年1月至2021年3月，通过SUS的门诊数据系统（Sistema de Informações Ambulatoriais do SUS，简称SIA/SUS）收集了巴西公共卫生系统的门诊就诊和住院数据。我们评估了40,009名患者，并发现SUS随访中每10万名患者中约有24.4例因PsA就诊。女性患者占主导地位（54.38%）。近年来，因PsA就诊的发生率有所增加，我们在2020年观察到了8,982次新的就诊。这些患者的主要合并症包括骨关节炎、腰痛、肩部损伤、肿瘤性疾病、晶体性关节病和骨质疏松症。住院主要是由于治疗临床或心血管疾病以及进行骨科手术。SUS中因PsA就诊的次数近年来有所增加，主要是因为该疾病的新诊断，尽管本研究人群中的患病率低于总体人口的观察结果。© 2023. Sociedade Brasileira de Reumatologia.

Psoriatic arthritis (PsA) is a chronic multisystem osteoarticular disease that requires specialized care. Most Brazilians depend on the public healthcare provided by the Unified Health System (Sistema Único de Saúde, SUS). This study aimed to describe the epidemiological characteristics of patients with PsA in follow-up in SUS, focusing on the incidence and prevalence of the disease, comorbidities, and hospitalizations.We collected data from the Outpatient Data System of SUS (Sistema de Informações Ambulatoriais do SUS, SIA/SUS) regarding outpatient visits and hospitalizations in the Brazilian public healthcare system from January 2008 to March 2021 using the Techtrials Disease Explorer® platform and the medical code related to PsA were selected.We evaluated 40,009 patients and found a prevalence of 24.4 cases of visits due to PsA per 100,000 patients in follow-up in SUS. Female patients were predominant (54.38%). The incidence of visits due to PsA has been increasing in recent years and we observed an incidence of 8,982 new visits in 2020. The main comorbidities of these patients were osteoarthritis, lower back pain, shoulder injuries, oncological diseases, crystal arthropathies, and osteoporosis. Hospitalizations were mainly due to treating clinical or cardiovascular conditions and performing orthopedic procedures.The number of visits due to PsA in SUS has increased in recent years, mainly on account of new diagnoses of the disease, although the prevalence found in this study's population was lower than that observed in the general population.© 2023. Sociedade Brasileira de Reumatologia.