Table 1. Patient Characteristics.
| Characteristic | Patients, No. (%) | |
|---|---|---|
| Case group with newly detected GC | Matched control group without newly detected GC | |
| Total patients, No. | 107 | 107 |
| Age, mean (SD), y | 71.7 (7.2) | 71.8 (7.0) |
| Sex | ||
| Male | 94 (87.9) | 94 (87.9) |
| Female | 13 (12.1) | 13 (12.1) |
| History of esophageal cancer | ||
| Absent | 89 (83.2) | 88 (82.2) |
| Present | 18 (16.8) | 19 (17.8) |
| History of gastric neoplasma | ||
| Absent | 25 (23.4) | 20 (18.7) |
| Present | 82 (76.6) | 87 (81.3) |
| Gastric mucosal atrophyb | ||
| Closed type | 11 (10.3) | 33 (30.8) |
| Open type | 96 (89.7) | 74 (69.2) |
| Helicobacter pylori infection | ||
| Positive | 36 (33.6) | 19 (17.8) |
| Positive and eradicated | 67 (62.6) | 48 (44.9) |
| Negative | 3 (2.8) | 9 (8.4) |
| Unknown | 1 (0.9) | 31 (29.0) |
| Aspirin use | ||
| Absent | 100 (93.5) | 90 (84.1) |
| Present | 6 (5.6) | 13 (12.1) |
| Unknown | 1 (0.9) | 4 (3.7) |
| Statin use | ||
| Absent | 91 (85.0) | 81 (75.7) |
| Present | 15 (14.0) | 19 (17.8) |
| Unknown | 1 (0.9) | 7 (6.5) |
| Smoking status | ||
| Present | 11 (10.3) | 10 (9.3) |
| Former | 57 (53.3) | 57 (53.3) |
| Never | 27 (25.2) | 25 (23.4) |
| Unknown | 12 (11.2) | 15 (14.0) |
| Alcohol consumption | ||
| Absent | 35 (32.7) | 36 (33.6) |
| Present | 67 (62.6) | 59 (55.1) |
| Unknown | 5 (4.7) | 12 (11.2) |
Abbreviation: GC, gastric cancer.
a
Gastric neoplasms included GCs and gastric adenomas.
b
Presence of gastric mucosal atrophy was based on the classification system proposed by Kimura and Takemoto.15