Hazard ratios (95% confidence intervals) for subsequent cancers (all, and invasive cancers only) following basal cell and squamous cell skin cancers compared to controls.

Hazard ratios are based on time to subsequent cancer compared to controls, adjusted for age at reference date, sex and smoking; stratified models are similarly adjusted except for the stratification variable. Where shown in bold, HR is statistically significant (alpha = 0.05).1All cancers: invasive plus in situ cancers of sites other than cervix and prostate.2Invasive cancers: stage 1–4 cancers and stage 0 bladder.3The HR associated with BCC did not vary significantly by sex or by age group.4The HR associated with SCC did not vary significantly by sex, but was significantly higher in those aged