- The p1-values shown refer to the comparison between individual groups and the rest of the subjects, and the p2 values refer to the pairwise comparisons between the groups. The differences between continuous variables were tested using Mann–Whitney test. The categorical variables were tested with chi-square or Fisher’s exact test. Significant values bolded
- Abbreviations: PM premalignant; BCC basal cell carcinoma; SCC squamous cell carcinoma; MM malignant melanoma; PAASI PhotoAging Area and Severity Index; AK actinic keratosis; UV ultraviolet