Abstract
Introduction Considering the growing recognition of the association between hidradenitis suppurativa (HS) and spondyloarthritis (SpA), this study addresses a gap in clinical practice in HS consultation: the absence of a validated arthritis screening tool. Methods Drawing on interdisciplinary collaboration between dermatology and rheumatology, we assayed a modified version of the PURE-4 tool: patient and dermatologist PURE-5 (p- and d- PURE-5), adapted to reflect clinical features relevant to this population. Results Of 214 HS patients, 125 (58.4%) were male, with a median age of 42 years (IQR 30–49). Buttock involvement was observed in 64 patients (29.9%) and was more common in males (35.7%) than in females (21.6%) (p = 0.26). Of the 214 patients, 82 (38.3%) answered negatively to all questions, while 118 (55.6%) answered positively to at least one question in the pPURE-5 but were later dismissed by the trained dermatologist after a more detailed interview. Finally, fourteen patients (6.5%) were referred to Rheumatology due to a positive dPURE-5. Of these, 2 (14.3%) were diagnosed with inflammatory chronic arthritis, yielding a PPV of 14.3%. Conclusion To conclude, the PURE-5 questionnaire appeared valuable for guiding anamnesis and facilitating rheumatology referrals. Even so, there is still a need for new and validated screening tools for detecting arthritis in HS population.