Table 2

Male cohort: Age-adjusted association of HCC mortality rates with suspected risk factors

Status at study entryPerson-yearsNo. of HCCRR95% CI
HBsAg
 Positive62,44764322.318.7–26.6
 Negative372,270257
History of acute hepatitis
 Yes86,5874073.73.2–4.2
 No348,140493
Family history of HCC
 Yes24,5901493.63.0–4.3
 No410,128751
Occupation
 Peasant316,8087521.81.5–2.1
 Nonpeasant117,910148
Current cigarette smoking
 Yes281,8755790.90.8–1.1
 No152,842321
Current alcohol drinking (≥4 drinks/week)
 Yes261,7404900.80.7–0.9
 No172,978410
Current tea drinking (≥4×/week)
 Yes68,3801180.80.7–1.0
 No366,338782
Drinking well water in 1980s
 Yes211,3833970.90.7–1.0
 No223,335503
Corn as staple food in 1980s
 Yes6999161.10.6–1.7
 No427,718884