Association between Single-Nucleotide Polymorphism in MicroRNA Target Site of DDB2 and Risk of Hepatocellular Carcinoma in a Southern Chinese Population
Table 1
Frequency distributions of selected variables in HCC cases and controls.
Variables
Cases n (%)
Controls n (%)
All subjects
1073
1119
Age
0.172
≤48b
522 (48.6)
577 (51.6)
>48
551 (51.4)
542 (48.4)
Sex
0.338
Males
946 (89.5)
1001 (88.2)
Females
127 (10.5)
118 (11.8)
Smoking
<0.001
Never
625 (58.2)
866 (77.4)
Ever
448 (41.8)
253 (22.6)
Drinking
<0.001
Never
655 (61.0)
894 (79.9)
Ever
418 (39.0)
225 (20.1)
HBV infection
<0.001
(−)
174 (16.2)
1005 (89.8)
(+)
899 (83.8)
114 (10.2)
aTwo-sided Chi-squared test. bThe median age of this population.