Fig. 2
Predicted spline curves for the associations between the levels of total Omega-3 PUFAs, EPA and DHA (mol %) and PASI scores among male patients using RCS regression models. A Total Omega-3 PUFAs, B EPA, and C DHA in total males, males with BMI < 28 kg/m2, and males with BMI < 23.99 kg/m2, respectively. In the models, covariates including age, education, smoking history, and alcohol use history were adjusted. β β-Coefficient, BMI body mass index, CI confidence interval, DHA docosahexaenoic acid, EPA eicosapentaenoic acid, PASI Psoriasis Area and Severity Index, PUFAs polyunsaturated fatty acids