Objective To evaluate variations in laboratory parameters and diagnoses of selected clinical conditions up to16 weeks after starting a new systemic psoriasis treatment for Psocare Registry enrollees.Design Prospective cohort study.Setting Italian public referral centres for psoriasis treatment.Patients First-time recipients (n = 10,539) of continuous systemic psoriasis treatment for at least 16 weeks.Main outcome measure Mean variations in (weeks 8 and 16) and proportions of patients reaching a clinicallymeaningful increase in serum levels (week 16) of total and low-density lipoprotein cholesterol, triglycerides, aspartateamino transferase, alanine amino transferase and creatinine, as well as week-16 cumulative incidences of newdiagnoses of diabetes mellitus and arterial hypertension.Results Mean cholesterol and triglyceride levels significantly increased in patients treated with acitretin orcyclosporine. Mean triglyceride levels also increased in efalizumab- and etanercept-treated patients. Meantransaminase values increased in methotrexate-treated patients, and mean aspartate amino transferase levelsincreased in infliximab-treated patients. The average serum creatinine value increased in cyclosporine-treatedpatients. Acitretin and cyclosporine were associated with risk of hypercholesterolaemia (odds ratios 1.51 and 1.34)and acitretin with risk of hypertriglyceridaemia (odds ratio 1.43). Methotrexate and infliximab were associated withrisk of more than doubling the upper normal aspartate amino transferase (odds ratios 2.06 and 1.87) and alanineamino transferase (odds ratios 2.38 and 1.74) values. The relative risk of developing arterial hypertension anddiabetes was increased for patients receiving cyclosporine (odds ratios 3.31 and 2.88).Conclusion Systemic treatments for psoriasis resulted in heterogeneous effects on the parameters analysed.Received: 1 September 2011; Accepted: 12 January 2012
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