Table 2 Summary of Differences between RHRI-PEPC and OSH-PC

Cancer types

30

29 (exclude a category of digestive system cancers combined)

Baseline cancer incidence rate

Use a value as age-standardized rate (ASR) published by IARC [14]

Use Korean age-specific incidence rate in the year of diagnosis

Lung cancer type

1 category for lung cancer

4 categories by cell type (squamous cell, adenocarcinoma, small cell, other types)

Lung cancer relative risk for smoking-related adjustment

Use relative risk by smoking level in the U.S. population

Use Korean lung cancer relative risk by smoking level [17]