Table 1.
Clinical data of the two groups of patients
| Variables | Non-SU group (n = 112) | SU group (n = 23) | χ 2/t | P value |
| Sex, n (%) | 0.086 | 0.769 | ||
| Male | 67 (59.82) | 13 (56.52) | ||
| Female | 45 (40.18) | 10 (43.48) | ||
| Age (yr), n (%) | 15.062 | < 0.001 | ||
| < 65 | 80 (71.43) | 6 (26.09) | ||
| ≥ 65 | 32 (28.57) | 17 (73.91) | ||
| Drinking history, n (%) | 2.280 | 0.131 | ||
| Yes | 46 (41.07) | 14 (60.87) | ||
| No | 66 (58.93) | 9 (39.13) | ||
| Smoking history, n (%) | 0.513 | 0.474 | ||
| Yes | 61 (54.46) | 15 (65.23) | ||
| No | 51 (45.54) | 8 (34.78) | ||
| Liver and kidney dysfunction, n (%) | 2.035 | 0.088 | ||
| Yes | 21 (18.75) | 8 (34.78) | ||
| No | 91 (81.25) | 15 (65.22) | ||
| Lymph node metastasis, n (%) | 14.316 | < 0.001 | ||
| Yes | 33 (29.46) | 17 (73.91) | ||
| No | 79 (70.54) | 6 (26.09) | ||
| Postoperative albumin decreased, n (%) | 0.263 | 0.608 | ||
| < 50 | 28 (25.00) | 4 (17.39) | ||
| ≥ 50 | 84 (75.00) | 19 (82.61) | ||
| Serum potassium (mmol/L) | 3.71 ± 0.58 | 3.73 ± 0.61 | -0.154 | 0.878 |
| Hemoglobin (g/L) | 121.28 ± 16.39 | 115.20 ± 18.52 | 0.115 | 0.115 |
| Fasting blood glucose (mmol/L) | 10.03 ± 4.54 | 8.15 ± 3.62 | 1.866 | 0.064 |
| CRP (mg/L) | 72.37 ± 12.09 | 75.32 ± 13.47 | 1.045 | 0.298 |
| TNF-α (pg/mL) | 149.00 ± 18.37 | 151.75 ± 21.41 | 0.635 | 0.526 |
| IL-6 (pg/mL) | 14.46 ± 2.28 | 15.02 ± 3.27 | 0.990 | 0.324 |
| IL-8 (pg/mL) | 18.43 ± 3.45 | 19.82 ± 3.04 | 1.793 | 0.075 |
| HSP70 | 2.32 ± 0.56 | 3.37 ± 0.81 | -5.876 | < 0.001 |
| HSP90 | 119.42 ± 17.81 | 159.35 ± 27.37 | -6.712 | < 0.001 |
| GAS | 121.92 ± 29.39 | 146.82 ± 35.36 | -3.571 | < 0.001 |
CRP: C-reactive protein; TNF-α: Tumor necrosis factor α; IL-6: Interleukin 6; IL-8: Interleukin 8; HSP70: Heat shock protein 70; HSP90: Heat shock protein 90; GAS: Gastrin; SU: Stress ulcer.