Table 1. The characteristics of 973 patients with GIP and N-GIP.
| Characteristics | GIP (n=943) | N-GIP (n=30) | P |
|---|---|---|---|
| Age, years | 60 (17.98) | 58 (18.47) | 0.549 |
| Male sex [n (%)] | 633 (67.1) | 21 (70.0) | 0.741* |
| ASA grade [n (%)] | 0.539* | ||
| I | 408 (43.3) | 16 (53.3) | |
| II | 371 (39.3) | 11 (36.7) | |
| III | 60 (6.4) | 2 (6.7) | |
| IV | 104 (11.1) | 1 (3.3) | |
| Duration of abdominal pain [median (IQR)] | 17.0 (7.90–48.90) | 48.0 (20.75–120.00) | <0.001** |
| Peritonitis [n (%)] | <0.001* | ||
| No peritonitis | 21 (2.2) | 16 (53.3) | |
| Localized peritonitis | 253 (26.8) | 10 (33.3) | |
| Generalized peritonitis | 669 (70.9) | 4 (13.3) | |
| Shock [n (%)] | 124 (13.1) | 1 (3.3) | 0.192* |
| Temperature | 37.43 (0.84) | 37.41 (0.78) | 0.918 |
| WBC | 12.96 (6.22) | 12.96 (5.59) | 1.000 |
| Percentage of neutrophils | 85.35 (8.90) | 81.35 (9.24) | 0.016 |
| Percentage of lymphocytes | 9.37 (7.67) | 12.23 (7.57) | 0.044 |
| NLR | 16.11 (13.92) | 11.07 (10.09) | 0.049 |
Values are means and values in parentheses are standard deviations unless indicated otherwise. N (%), number (percentage). P, Student’s t-test. P*, Chi-square test. P**, Mann-Whitney U-test. GIP, gastrointestinal perforation; N-GIP, negative surgical exploration in suspected gastrointestinal perforation; IQR, interquartile range; ASA, American Society of Anesthesiologists; WBC, white blood cell count; NLR, neutrophil-to-lymphocyte ratio.