Predictors of gastric cancer in the logistic regression model and the associated prediction rule
| Variable | Regression coefficient | Adjusted OR (95% CI) | P value | Points assigned* |
| Age, years | ||||
| 40–49 | Reference | 0 | ||
| 50–59 | 1.020 | 2.77 (1.72 to 4.47) | <0.001 | 4 |
| 60–69 | 1.461 | 4.31 (2.69 to 6.89) | <0.001 | 6 |
| >69 | 2.160 | 8.67 (5.32 to 14.13) | <0.001 | 9 |
| Sex | ||||
| Female | Reference | 0 | ||
| Male | 0.922 | 2.52 (1.92 to 3.30) | <0.001 | 4 |
| Pickled food | ||||
| Occasional | Reference | 0 | ||
| Regular | 0.396 | 1.49 (1.10 to 2.01) | 0.010 | 2 |
| Fried food | ||||
| Occasional | Reference | 0 | ||
| Regular | 0.535 | 1.71 (1.15 to 2.54) | 0.008 | 2 |
| Anti-H. pylori IgG, EIU | ||||
| Negative (<34) | Reference | 0 | ||
| Positive (≥34) | 0.233 | 1.26 (1.12 to 1.62) | 0.046 | 1 |
| PG I/II ratio | ||||
| ≥3.89 | Reference | 0 | ||
| <3.89 | 0.702 | 2.02 (1.41 to 2.90) | <0.001 | 3 |
| G-17, pmol/L | ||||
| ≤1.49 | Reference | 0 | ||
| 1.50–5.70 | 0.693 | 2.00 (1.33 to 3.00) | 0.001 | 3 |
| >5.70 | 1.044 | 2.84 (1.93 to 4.17) | <0.001 | 4 |
*Points were assigned by dividing the regression coefficients by the absolute value of the smallest coefficient in the model and rounding up to the nearest integer. A regression coefficient of 0.233 corresponded approximately to one point.
EIU, enzyme-immunoassay unit; G-17, gastrin-17; H. pylori, Helicobacter pylori; PG, pepsinogen.