Risk Factors Affecting Adverse Effects of Cyclosporine A in a Real-World Psoriasis Treatment

Background No study to date has focused on the changes in laboratory test results and related risk factors in patients with psoriasis treated with prolonged Cyclosporine A (CsA) therapy. Objective The objective of this study was to investigate the changes of laboratory values and related risk factors in patients with psoriasis treated with CsA in a real-world setting. Methods Records of patients with psoriasis treated with CsA at an outpatient clinic were collected, and a Cox proportional hazards regression model was used. Results Of the 128 patients included in this study, 28 patients (21.9%) showed laboratory test abnormalities over a mean medication period of 11.6 months. Older age (hazard ratio [HR], 1.174; 95% confidence interval [CI], 1.068~1.370; p=0.007) and pre-existing kidney disease (HR, 0.008; 95% CI, 0~0.205; p=0.001) significantly increased the risk of renal dysfunction. Male sex was the only significant risk factor for liver enzyme elevation (HR, 0.284; 95% CI, 0.081~0.784; p=0.026) and uric acid abnormality (HR, 0.048; 95% CI, 0~0.372; p=0.046). Conclusion This is an in-depth analysis of laboratory changes and related risk factors in patients with psoriasis treated with CsA. Liver is the most commonly affected organ of CsA toxicity. Older age, male sex, and presence of kidney disease were risk factors associated with laboratory abnormality during CsA treatment.