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

<p>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).</p>1<p>All cancers: invasive plus in situ cancers of sites other than cervix and prostate.</p>2<p>Invasive cancers: stage 1–4 cancers and stage 0 bladder.</p>3<p>The HR associated with BCC did not vary significantly by sex or by age group.</p>4<p>The HR associated with SCC did not vary significantly by sex, but was significantly higher in those aged <60 than those aged ≥60 (p<0.003).