Table 1.
Baseline Characteristics of the Study Population (n=10,185)
| Characteristic | Value |
|---|---|
| Age, yr | 47.81±11.22 |
| <55 | 7,339 (72.1) |
| ≥55 | 2,846 (27.9) |
| Male sex | 5,581 (54.8) |
| Smoking* | |
| Nonsmoker | 1,242 (45.3) |
| Ex-smoker | 1,072 (39.1) |
| Current smoker | 425 (15.5) |
| Smoking, pack-year† | 11.25±16.59 |
| Heavy drinking‡ | |
| No | 2,249 (82.0) |
| Yes | 494 (18.0) |
| Alcohol intake, drinks/wk‡ | 7.20±11.97 |
| Family history of gastric cancer§ | 446 (14.7) |
| Mucosal atrophy at baseline | |
| Normal | 6,471 (63.5) |
| C1 | 1,018 (10.0) |
| C2 | 1,313 (12.9) |
| C3 | 865 (8.5) |
| O1 | 338 (3.3) |
| O2 | 139 (1.4) |
| O3 | 41 (0.4) |
| Intestinal metaplasia | |
| Absent | 8,759 (86.0) |
| Present | 1,426 (14.0) |
| Helicobacter pylori infection status|| | |
| Not infected | 3,899 (40.5) |
| Eradicated | 127 (1.3) |
| Infected | 5,597 (58.2) |
| Follow-up period, yr¶ | 6.88±3.18 |
Data are presented as mean±SD or number (%).
*
Data available for 2,739 subjects;
†
Data available for 2,492 subjects;
‡
Data available for 2,743 subjects;
§
Data available for 3,041 subjects;
||
Data available for 9,623 subjects;
¶
Data available for 5,567 subjects.