Figure 3 Gender and the course of psoriasis (A) and the emotional state of patients (B). The t test for independent samples. Due to the sample sizes being larger than 30 in the studied subgroups, the t test for paired samples was applied (without the Welch correction, as the Levene’s test did not show significant differences in variances). The t test did not reveal any significant differences between the groups defined by the gender variable.