Intra- and inter-examiner reliability levels
Cohen’s κ and weighted κ values were calculated to determine intra- (reassessment of the collection after 1 month) and inter-examiner reliability (two examiners assessed photographs from 30 patients) for DL measurements. The intra-examiner κ value was 0.81 (very good), and the inter-examiner κ value was 0.78 (good). Intra-rater weighted κ showed 0.81 (95% CI 0.78–0.84), and inter-rater weighted κ showed 0.78 (95% CI 0.75–0.81).