CRP and fibromyalgia: None of the other variables reached significance: FACIT-F (p = 0.7), PASI (p = 0.8), CRP (p = 0.1), ferritin (p = 0.2), HADS-D (p = 0.1), smoking exposure in pack-years (p = 0.2), age (p = 0.5), BMI (p = 0.1), sex (p = 0.06), or fibromyalgia (p = 0.3).