| | Young group (270) | Elderly group (443) | value |
| Female | 34 (12.6) | 138 (31.2) | <0.001 | Age | 48.00 [39.00, 55.00] | 71.00 [65.00, 80.50] | <0.001 | Black stool | 209 (77.4) | 323 (72.9) | 0.212 | Haematemesis | 113 (41.9) | 181 (40.9) | 0.855 | Comorbidities | | | | CAD | 38 (14.1) | 150 (33.9) | <0.001 | CHF | 10 (3.7) | 51 (11.5) | 0.001 | Hypertension | 77 (28.5) | 274 (61.9) | <0.001 | Diabetes | 44 (16.3) | 176 (39.7) | <0.001 | Valvular disease | 11 (4.1) | 76 (17.2) | <0.001 | Oncological disease | 13 (4.8) | 95 (21.4) | <0.001 | Kidney disease | 12 (4.4) | 60 (13.5) | <0.001 | Respiratory diseases | 30 (11.1) | 184 (41.5) | <0.001 | Cirrhosis | 25 (9.3) | 43 (9.7) | 0.948 | Atrial fibrillation | 0 (0.0) | 34 (7.7) | <0.001 | Cerebrovascular disease | 13 (4.8) | 94 (21.2) | <0.001 | Laboratory values | | | | WBC | 7.36 [5.82, 9.78] | 7.43 [5.58, 9.79] | 0.604 | Hemoglobin | 86.00 [73.00, 102.00] | 82.00 [70.00, 96.00] | 0.018 | Platelets | 200.00 [163.00, 247.00] | 179.00 [130.50, 222.50] | <0.001 | Urea nitrogen | 6.03 [4.40, 9.05] | 7.80 [5.50, 12.05] | <0.001 | Calcium | 1.98 [1.82, 2.08] | 1.93 [1.59, 2.06] | 0.013 | Creatine kinase | 89.00 [62.50, 136.50] | 80.00 [52.25, 142.00] | 0.097 | Globulin | 20.38 [17.16, 23.21] | 21.58 [17.56, 25.00] | 0.007 | INR | 1.09 [1.05, 1.17] | 1.12 [1.05, 1.18] | 0.048 | Creatinine | 75.00 [64.00, 84.25] | 78.00 [63.00, 96.00] | 0.012 | Albumin | 34.16 [30.71, 37.29] | 32.00 [28.81, 34.37] | <0.001 | Physical examination | | | | Heart rate | 88.00 [80.00, 95.00] | 82.00 [76.00, 90.00] | <0.001 | SBP | 126.00 [115.00, 137.00] | 130.00 [118.00, 141.00] | 0.001 | Respiratory rate | 20.00 [18.00, 22.00] | 20.00 [18.00, 21.00] | 0.367 | Height | 72.15 [62.12, 84.00] | 65.00 [55.00, 74.60] | <0.001 | Weight | 172.00 [167.00, 177.00] | 168.00 [160.00, 172.00] | <0.001 | BMI | 24.54 [22.00, 28.34] | 24.24 [21.83, 26.25] | 0.022 |
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