Table 1.

Demographic data of study subjects

Controls, n (%)Gastric carcinoma cases, n (%)P*
No. subjects308470
Age (y)
    <5032 (10.4)51 (10.9)0.970
    50-65123 (39.9)189 (40.2)
    >65153 (49.7)230 (48.9)
Sex
    Female126 (40.9)210 (44.7)0.301
    Male182 (59.1)260 (55.3)
Ethnicity
    Ethnic A118 (38.3)287 (61.1)<0.001
    Ethnic B§185 (60.1)174 (37.0)
        Hoklo 145(47.1)124 (26.4)
        Hakka 40(13.0)50 (10.6)
    Unknown5 (1.6)9 (1.9)
  • * Two-sided χ2 test.

  • Subjects who either emigrated from mainland China to Taiwan around the year 1949 or were born in Taiwan but with parents from mainland China.

  • Three-group (ethnic A, Hoklo, and Hakka) and two-group (ethnic A and ethnic B) two-sided χ2 test.

  • § Subjects born in Taiwan with ancestry as Hoklo or Hakka, originating from south Fujian (Hoklo) or north Guangdong (Hakka) of China and living in Taiwan for several generations.