Figure 3.

Freedom from recurrence over time of non-melanoma skin cancer treated with image-guided superficial radiation therapy by Charlson Comorbidity Index (CCI) scores 0–6+. Higher CCI scores represent higher comorbidity burdens. The “At Risk” value represents the sample size at the corresponding year of follow-up. The “Events” value represents the number of NMSC lesions that have recurred by the corresponding year of follow-up. The p value of 0.9 indicates that the differences in freedom from recurrence between CCI groups are not statistically significant.