Table 2 Clinical characteristics and intervention of the training set and the test set
|  | Training set (n = 1,111) | Test set (n = 278) | P-Value |
|---|---|---|---|
Baseline characteristics | |||
 Age, mean (SD) | 64.2 (15.2) | 64.8 (14.8) | 0.559 |
 Male, n (%) | 720 (64.8) | 182 (65.5) | 0.892 |
 Cirrhosis, n (%) | 351 (31.6) | 86 (30.9) | 0.889 |
 Malignancy, n (%) | 176 (15.8) | 55 (19.8) | 0.137 |
 Antithrombotic use, n (%) | 556 (50.0) | 133 (47.8) | 0.555 |
 Previous UGIB, n (%) | 198 (17.8) | 52 (18.7) | 0.798 |
Clinical presentation | |||
 Time to presentation (hour), mean (SD) | 25.9 (23.6) | 26.9 (22.6) | 0.499 |
 Red emesis, n (%) | 333 (30.0) | 77 (27.7) | 0.503 |
 Coffee ground, n (%) | 366 (32.9) | 86 (30.9) | 0.570 |
 Melena, n (%) | 555 (50.0) | 147 (52.9) | 0.421 |
 Maroon, n (%) | 80 (7.2) | 24 (8.6) | 0.494 |
 Red stool, n (%) | 21 (1.9) | 3 (1.1) | 0.449 |
 Systolic BP, mean (SD) | 115.0 (25.7) | 113.9 (22.9) | 0.470 |
 Heart rate, mean (SD) | 92.2 (19.3) | 93.7 (19.3) | 0.247 |
 Resuscitation, n (%) | 245 (22.1) | 57 (20.5) | 0.632 |
Laboratory findings | |||
 Hemoglobin, mean (SD) | 8.2 (2.6) | 8.1 (2.6) | 0.935 |
 Platelet (x106), mean (SD) | 210 (111) | 218 (130) | 0.375 |
 INR, mean (SD) | 1.7 (1.9) | 1.7 (1.5) | 0.680 |
 Albumin, mean (SD) | 3.1 (0.7) | 3.2 (0.6) | 0.127 |
 BUN/Cr ratio, mean (SD) | 32.0 (30.6) | 31.4 (16.5) | 0.648 |
Result | |||
 Intervention, n (%) | 482 (43.4) | 133 (47.8) | 0.204 |