Figure 5. Risk of Developing Any Smoking- or Obesity-Related Subsequent Primary Cancers Among Survivors of Prior Smoking- or Obesity-Related Cancers.

Among each group of survivors of 12 smoking-related cancers,¹⁶ incidence per 10 000 person-years and standardized incidence ratios (SIRs) were estimated to quantify the risk of developing any smoking-related subsequent primary cancers (SPCs) (except for SPCs that occurred at the same site as the first primary cancer [FPC]). This was also calculated for 12 obesity-related cancers.¹⁷ The risk of developing subsequent smoking- or obesity-related cancer after each FPC cannot be entirely attributable to smoking or obesity because of other risk factors. See Supplement 1 for detailed data.