https://www.selleckchem.com/products/ly333531.html The incidence of psoriatic arthritis in patients with psoriasis is unclear; existing estimates differ by a factor of ten. Complete population-level data is needed to provide accurate estimates with high confidence. A total of 123,814 adults with psoriasis, free from pre-existing psoriatic arthritis, were identified in population-based data from secondary care in Sweden during 2007 to 2017. Incidence was calculated as the number of psoriatic arthritis diagnosis events per 100 patient-years. Time to diagnosis was assessed using cumulative incidence and Cox proportional hazards models to identify risk factors. Incidence of psoriatic arthritis in patients with psoriasis was 1.69 per 100 patient-years (95% confidence interval 1.65-1.72) overall, and 1.48, 3.00, and 5.49 per 100 patient-years in patients with mild, moderate and severe psoriasis, respectively. Risk of psoriatic arthritis was 3.2 times higher amongst patients with severe psoriasis compared with mild disease. Dermatologists should regularly assess risk factors for psoriatic arthritis in clinical practice in order to improve the detection of psoriatic arthritis.Gel nail polish is commonly used in manicures; how-ever, research into the side-effects of gel nail polish is scarce and focusses mainly on allergic contact dermatitis. The aim of this study was to assess the frequency and characteristics of side-effects associated with use of gel nail polish. A self-questionnaire survey was conducted on a representative sample of individuals (n = 2,118, all female). Of these, 48.3% reported side-effects while applying gel nail polish, approximately 20% during wearing it, and more than 75% after removing the polish. Frequency of changes in the nail plates was significantly higher after removing the gel nail polish than when applying or wearing it (p  less then  0.0001). Frequency of changes in the nail plates was associated with whether the procedure was performed by p