Table 2 Incidence rate ratio (IRR) compared to the matched control group according to sex and age groups.

Esophagus (C15)

1.51 (0.34, 6.73)

0.71* (0.59, 0.86)

0.99 (0.85, 1.17)

0.67 (0.07, 6.42)

1.00 (0.60, 1.67)

0.81 (0.49, 1.35)

Stomach (C16)

0.88 (0.67, 1.16)

1.01 (0.95, 1.07)

1.01 (0.95, 1.07)

0.91 (0.70, 1.17)

0.90* (0.82, 0.98)

0.93 (0.85, 1.02)

Small intestine (C17)

2.01 (0.41, 9.94)

1.39 (0.90, 2.15)

1.07 (0.67, 1.72)

1.00 (0.09, 11.05)

1.41 (0.68, 2.96)

1.27 (0.73, 2.23)

Colorectum (C18–C20)

1.07 (0.79, 1.44)

0.86* (0.81, 0.92)

0.93* (0.87, 1.00)

1.03 (0.80, 1.32)

1.02 (0.93, 1.11)

0.94 (0.87, 1.02)

Anus (C21)

–

0.61 (0.26, 1.42)

0.84 (0.46, 1.53)

0.67 (0.07, 6.42)

0.88 (0.48, 1.62)

1.05 (0.57, 1.93)

Hepatocellular carcinoma and others (C22 except 22.1)

1.37 (0.98, 1.91)

1.21** (1.12, 1.30)

1.14** (1.04, 1.25)

1.68 (0.94, 3.01)

1.27** (1.09, 1.48)

1.30** (1.13, 1.49)

Intrahepatic bile duct (C22.1)

2.68 (0.60, 11.96)

1.98** (1.65, 2.37)

1.51** (1.31, 1.73)

3.34 (0.80, 13.98)

1.73** (1.34, 2.24)

2.00** (1.69, 2.37)

Extrahepatic bile duct (C24)

0.33 (0.04, 2.78)

1.79** (1.47, 2.17)

1.93** (1.68, 2.21)

4.01 (0.36, 44.21)

1.85** (1.44, 2.37)

1.97** (1.69, 2.30)

Pancreas (C25)

1.82 (0.77, 4.30)

1.29** (1.11, 1.49)

0.98 (0.86, 1.11)

1.38 (0.64, 2.97)

1.28** (1.08, 1.52)

1.15** (1.01, 1.31)

Unspecified digestive system (C26)

2.01 (0.13, 32.09)

0.78 (0.33, 1.86)

0.78 (0.30, 2.01)

–

3.01** (1.07, 8.44)

0.56 (0.19, 1.71)

Overall gastrointestinal and hepato-biliary-pancreatic cancers

1.09 (0.92, 1.28)

1.04** (1.01, 1.08)

1.06** (1.03, 1.10)

1.04 (0.89, 1.23)

1.07** (1.02, 1.13)

1.11** (1.06, 1.16)