Table 2.
Incidence of gastric cancer according to different variables.
| Variable | Case | Person Year | Incidence |
|---|---|---|---|
| Group | |||
| Control | 300 | 67,422 | 4.40 |
| Other histamine-2 blockers | 300 | 67,470 | 4.40 |
| Ranitidine medicine | 306 | 67,444 | 4.50 |
| Sex | |||
| Female | 291 | 86,930 | 3.30 |
| Male | 615 | 115,406 | 5.30 |
| Age (years) | |||
| 20–44 | 151 | 137,703 | 1.10 |
| 45–64 | 365 | 55,254 | 6.60 |
| ≥65 | 390 | 9380 | 41.60 |
| Residence | |||
| Seoul (metropolitan) | 128 | 42,954 | 3.00 |
| Second area (other metropolitan) | 192 | 52,312 | 3.70 |
| Third area | 586 | 107,070 | 5.50 |
| Household income | |||
| Low (0–30%) | 275 | 47,602 | 5.80 |
| Middle (31–70%) | 330 | 80,003 | 4.10 |
| High (71–100%) | 301 | 74,731 | 4.00 |
| Disability | |||
| No | 826 | 196,401 | 4.20 |
| Yes | 80 | 5935 | 13.50 |
| NSAID | |||
| No | 78 | 25,310 | 3.10 |
| <60 days | 369 | 120,330 | 3.10 |
| 60–120 days | 122 | 27,853 | 4.40 |
| 121–180 days | 77 | 8169 | 9.40 |
| >180 days | 260 | 20,673 | 12.60 |
| Smoking | |||
| Never | 576 | 128,655 | 4.50 |
| Former | 94 | 22,240 | 4.20 |
| Current | 236 | 51,441 | 4.60 |
| Alcohol drinking habit | |||
| Rare | 578 | 107,445.2 | 5.40 |
| Intermediate | 245 | 77,839.9 | 3.10 |
| Heavy | 83 | 17,050.6 | 4.90 |