Original Research
Copyright ©The Author(s) 2001.
World J Gastroenterol. Aug 15, 2001; 7(4): 506-509
Published online Aug 15, 2001. doi: 10.3748/wjg.v7.i4.506
Table 1 Main characteristics of cases and controls
Cases (n = 95)
Controls (n = 94)
n(%)n(%)
Age groups/yr
< 5021(22.1)22(23.4)
50-5923(24.2)22(23.4)
60-6933(34.7)34(36.2)
≥ 7018(19.0)16(17.0)
Mean age59 ± 1158 ± 11
Age range32-7834-79
Gender
Male81(85.3)82(87.2)
Female14(14.7)12(12.8)
Education
College1(1.1)1(1.1)
High school15(15.8)63(67.0)
Elementary61(64.2)22(23.4)
school
Illiterate18(19.0)8( 8.5)