Fig. 2.

Depressive symptoms and quality of life. a Depressive symptoms determined by PHQ-9. Patients with PsA shown in dark blue, patients with Pso with PEST ≥ 3 in light blue, patients with Pso with PEST < 3 in white. b Pearson’s correlations between clinical data, quality of life, and depressive symptoms. Numbers within the graph represent Pearson’s R values. Red color indicates positive correlation, blue negative correlation. BMI body mass index, QoL quality of life, FFbH Functional Questionnaire Hannover, PEST Psoriasis Epidemiology Screening Tool, PHQ-9 Patient health questionnaire 9 (depressive symptoms), PsA psoriatic arthritis, Pso psoriasis, WHOQOL D1 World Health Organization Quality of Life Domain 1 (= physical health-related QoL), D2 = mental HRQoL, D3 = social QoL, D4 = environmental QoL