Table 1 Patient characteristics
Characteristic | Training set (N = 100) | Independent testing set (N = 75) | In total (N = 175) |
|---|---|---|---|
Age, y median (range) | 63 (29–83) | 63 (29–83) | 63 (29–83) |
 ≥ 63 | 51 (51%) | 40 (53%) | 91 (52%) |
 < 63 | 49 (49%) | 35 (47%) | 84 (48%) |
Sex | Â | Â | Â |
 Male | 74 (74%) | 57 (76%) | 131 (75%) |
 Female | 26 (26%) | 18 (24%) | 44 (25%) |
Tumor Site | Â | Â | Â |
 Distal stomach | 34 (34%) | 28 (37%) | 62 (35%) |
 Proximal stomach | 41 (41%) | 29 (39%) | 70 (40%) |
 Whole stomach | 25 (25%) | 18 (24%) | 43 (25%) |
Stage | Â | Â | Â |
 I | 13 (13%) | 7 (9%) | 20 (11%) |
 II | 20 (20%) | 21 (28%) | 41 (23%) |
 III | 65 (65%) | 45 (60%) | 110 (63%) |
 IV | 2 (2%) | 2 (3%) | 4 (3%) |
Histological grade | Â | Â | Â |
 2 | 20 (20%) | 16 (21%) | 36 (21%) |
 3 | 47 (47%) | 34 (46%) | 81 (46%) |
 Mixed 1–2 | 3 (3%) | 3 (4%) | 6 (3%) |
 Mixed 2–3 | 30 (30%) | 22 (29%) | 52 (30%) |
Lymph node metastasis | Â | Â | Â |
 No | 21 (21%) | 19 (25%) | 40 (23%) |
 Yes | 79 (79%) | 56 (75%) | 135 (77%) |