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Disease characteristics of psoriatic arthritis patients may differ according to age at psoriasis onset: Cross-sectional data from the psoriatic arthritis-international database

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Bilgin, E.
Aydin, S. Z.
Tinazzi, I.
Bayindir, O.
Kimyon, G.
Ozisler, C.
Dogru, A.
Aksu, K.
Cetin, G. Yildirim
Yilmaz, S.

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Clinical & Exper Rheumatology

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ObjectiveTo explore the impact of early versus late-onset psoriasis (PsO) on the disease characteristics of psoriatic arthritis (PsA) in a large-multicentre cohort.MethodsThe data from a multicentre psoriatic arthritis database was analysed. Patients were grouped according to age at psoriasis onset (early onset; 40 years of age, late-onset; 40 years of age) and disease characteristics of the groups were compared by adjusting for BMI and PsA duration, where necessary.ResultsAt the time of analyses, 1634 patients were recruited [62.8% females; early onset 1108 (67.8%); late-onset, 526 (32.2%)]. The late-onset group was more over-weight [66.8% vs. 86.8%, p<0.001; adjusted for age -aOR 1.55 (1.11-2.20; 95% CI)]. The early onset group had more scalp psoriasis at onset (56.7% vs. 43.0%, p<0.001), whereas extremity lesions were more common in the late-onset group (63.8% vs. 74.2%, p<0.001). Axial disease in males and psoriatic disease family history in females were significantly higher in the early onset group [38.0% vs. 25.4%; p=0.005; adjusted for PsA duration -aOR 1.76 (1.19-2.62; 95% CI) / 39.5% vs. 30.1%; p=0.003; OR 1.51 (1.15-1.99; 95% CI), respectively]. Psoriatic disease activity parameters, patient-physician reported outcomes and HAQ-DI scores were similar in both groups.ConclusionClinical features of PsA may be affected by the age at onset of PsO. Different genetic backgrounds in early and late-onset PsO may be driving the differences in psoriasis and PsA phenotypes.

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Phenotype, Psoriasis, Psoriatic arthritis, Early and late-onset, Science & technology, Life sciences & biomedicine, Rheumatology, Rheumatology

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