Table 5. The subgroup analyses for patients with HBsAg negative: multivariate logistic regression analyses.
| Variable | AOR | 95% CI | P-value |
|---|---|---|---|
| HBsAg negative (A) | 0.04 | ||
| HBsAg negative and anti-HBc negative and anti-HBs negative | 1 | Reference | |
| HBsAg negative and anti-HBc negative and anti-HBs positive | 1.04 | 0.74–1.45 | 0.83 |
| HBsAg negative and anti-HBc positive and anti-HBs negative | 1.67 | 0.997–2.80 | 0.051 |
| HBsAg negative and anti-HBc positive and anti-HBs positive | 0.79 | 0.533–1.17 | 0.23 |
| HBsAg negative (B) | 0.04 | ||
| HBsAg negative and anti-HBc positive and anti-HBs negative | 1 | Reference | |
| HBsAg negative and anti-HBc negative and anti-HBs positive | 0.62 | 0.39–0.996 | 0.048 |
| HBsAg negative and anti-HBc positive and anti-HBs positive | 0.47 | 0.28–0.49 | 0.004 |
| HBsAg negative and anti-HBc negative and anti-HBs negative | 0.60 | 0.36–1.003 | 0.051 |
Abbreviations: anti-HBc=antibody to hepatitis B core antigen; anti-HBs=antibody to hepatitis B surface antigen; CI=confidence interval; HBsAg=hepatitis B surface antigen; OR=odds ratio.
The results were adjusted by history of chronic gastritis (no/yes), family history of gastric cancer (no/yes), age (as a continuous variable), sex (male/female) and year of diagnosis (2007/2008/2009).