Table 1

Characteristics of study subjects at baseline

Status at study entryMaleFemale
No. of subjects58,45425,340
Age (yr)
 25–3410,934 (18.7%)6148 (24.3%)
 35–4420,943 (35.8%)9839 (38.8%)
 45–5416,888 (28.9%)6384 (25.2%)
 55–649689 (16.6%)2969 (11.7%)
HBsAg
 Positive8795 (15.0%)2711 (10.7%)
 Negative49,65922,629
Occupation
 Peasant42,178 (72.2%)21,148 (83.5%)
 Nonpeasant16,2762192
Smoking
 Yes37,856 (64.8%)891 (3.5%)
 No20,59824,449
Drinking alcohol (≥4 drinks/week)
 Yes35,171 (60.2%)3429 (13.5%)
 No23,28321,911
History of acute hepatitis
 Yes11,932 (20.4%)3657 (14.4%)
 No46,52221,683
Family history of HCC
 Yes3362 (5.8%)1190 (4.7%)
 No55,09224,150