Table 1. Baseline characteristics of patients according to age group.
| Variable | Age group, year | P value | Total (n = 448) |
|||
|---|---|---|---|---|---|---|
| <50 (n = 111) |
50–59 (n = 98) |
60–69 (n = 154) |
70–79 (n = 85) |
|||
| Sex, n (%) | 0.004 | |||||
| Male | 65 (58.6) | 79 (80.6) | 111 (72.1) | 63 (74.1) | 318 | |
| Female | 46 (41.4) | 19 (19.4) | 43 (27.9) | 22 (25.9) | 130 | |
| Registered hospital, n (%) | ||||||
| Chungnam University Hospital | 72 (64.9) | 65 (66.3) | 83 (53.9) | 38 (44.7) | 258 | |
| Hanyang University Guri Hospital | 39 (35.1) | 33 (33.7) | 71 (46.1) | 47 (55.3) | 190 | |
| Education, n (%) | <0.001 | |||||
| College or higher | 27 (24.3) | 10 (10.2) | 11 (7.1) | 3 (3.5) | 51 | |
| Middle or high school | 68 (61.3) | 62 (63.3) | 65 (42.2) | 17 (20.0) | 212 | |
| Elementary school or none | 12 (10.8) | 22 (22.4) | 66 (42.9) | 53 (62.4) | 153 | |
| Unknown | 4 (3.6) | 4 (4.1) | 12 (7.8) | 12 (14.1) | 32 | |
| Smoking habit, n (%) | <0.001 | |||||
| Never smoker | 49 (44.1) | 22 (22.4) | 50 (32.5) | 26 (30.6) | 147 | |
| Former smoker | 24 (21.6) | 25 (25.5) | 59 (38.3) | 33 (38.8) | 141 | |
| Current smoker | 38 (34.2) | 51 (52.0) | 45 (29.2) | 25 (29.4) | 159 | |
| Unknown | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (1.2) | 1 | |
| Alcohol consumption, n (%) | 0.090 | |||||
| Never drinker | 33 (29.7) | 21 (21.4) | 58 (37.7) | 27 (31.8) | 139 | |
| Former drinker | 15 (13.5) | 22 (22.4) | 29 (18.8) | 18 (21.2) | 84 | |
| Current drinker | 63 (56.8) | 55 (56.1) | 67 (43.5) | 40 (47.1) | 225 | |
| Family history of gastric cancer, n (%) | 0.213 | |||||
| Absence | 79 (71.2) | 79 (80.6) | 122 (79.2) | 70 (82.4) | 350 | |
| Presence | 32 (28.8) | 19 (19.4) | 32 (20.8) | 15 (17.6) | 98 | |
| Helicobacter pylori infection, n (%) | 0.352 | |||||
| Absence | 29 (26.1) | 29 (29.6) | 61 (39.6) | 34 (40.0) | 153 | |
| Presence | 34 (30.6) | 28 (28.6) | 44 (28.6) | 23 (27.1) | 129 | |
| Unknown | 48 (43.2) | 41 (41.8) | 49 (31.8) | 28 (32.9) | 166 | |
| TNM stage, n (%) | 0.298 | |||||
| I | 55 (49.5) | 63 (64.3) | 89 (57.8) | 40 (47.1) | 247 | |
| II | 19 (17.1) | 11 (11.2) | 27 (17.5) | 17 (20.0) | 74 | |
| III | 26 (23.4) | 19 (19.4) | 26 (16.9) | 17 (20.0) | 88 | |
| IV | 11 (9.9) | 5 (5.1) | 12 (7.8) | 11 (12.9) | 39 | |
| Treatment for gastric cancer, n (%) | 0.074 | |||||
| Operation | 100 (90.1) | 94 (95.9) | 143 (92.9) | 73 (85.9) | 410 | |
| Palliative chemotherapy | 5 (4.5) | 1 (1.0) | 2 (1.3) | 1 (1.2) | 9 | |
| Supportive care alone | 6 (5.4) | 3 (3.1) | 9 (5.8) | 11 (12.9) | 29 | |
TNM, tumor-node-metastasis