| Training cohort | Internal validation cohort | External validation cohort | ||||||
---|---|---|---|---|---|---|---|---|---|
Low expression | High expression | P* | Low expression | High expression | P* | Low expression | High expression | P* | |
N = 100 | N = 48 |  | N = 29 | N = 12 |  | N = 116 | N = 34 |  | |
Age, mean ± SD, years | 62.2 ± 12.66 | 63.08 ± 12.03 | 0.683 | 63 ± 13.1 | 60.17 ± 12.76 | 0.53 | 61.81 ± 10.30 | 59.91 ± 9.99 | 0.649 |
Sex | Â | Â | 1.000 | Â | Â | 0.629 | Â | Â | 0.960 |
 Female | 47 (47.00%) | 22 (45.83%) |  | 14 (48.28%) | 4 (33.33%) |  | 71 (61.21%) | 20 (58.82%) |  |
 Male | 53 (53.00%) | 26 (54.17%) |  | 15 (51.72%) | 8 (66.67%) |  | 45 (38.79%) | 14 (41.18%) |  |
Location | Â | Â | 0.662 | Â | Â | 0.184 | Â | Â | 0.007 |
 Intestine | 37 (37.00%) | 21 (43.75%) |  | 10 (34.48%) | 7 (58.33%) |  | 20 (17.24%) | 14 (41.18%) |  |
 Stomach | 63 (63.00%) | 27 (56.25%) |  | 19 (65.52%) | 5 (41.67%) |  | 96 (82.76%) | 20 (58.82%) |  |
Size (cm) |  |  | < 0.001 |  |  | < 0.001 |  |  | < 0.001 |
  ≤ 2 | 13 (13.00%) | 1 (2.08%) |  | 4 (13.79%) | 0 (0%) |  | 21 (18.1%) | 1 (2.94%) |  |
  2–5 | 54 (54.00%) | 13 (27.08%) |  | 14 (48.28%) | 1 (8.33%) |  | 68 (58.62%) | 11 (32.35%) |  |
  5–10 | 28 (28.00%) | 19 (39.58%) |  | 8 (27.59%) | 4 (33.33%) |  | 27 (23.28%) | 15 (44.12%) |  |
  > 10 | 5 (5.00%) | 15 (31.25%) |  | 3 (10.34%) | 7 (58.33%) |  | 0 (0) | 7 (20.59%) |  |