Table 1. Demographic and clinical characteristics of the study population.
| Variable | Category | Diabetes mellitus | p-value* | |
|---|---|---|---|---|
| Absent (n=2,902) | Present (n=318) | |||
| Age (yr) | 45.60±16.77 (11~96) | 61.90±12.55 (23~91) | <0.001 | |
| Sex | Female | 1,240 (42.7) | 127 (39.9) | 0.370 |
| Male | 1,662 (57.3) | 191 (60.1) | ||
| Season | Summer | 863 (29.7) | 81 (25.5) | 0.043 |
| Autumn | 508 (17.5) | 44 (13.8) | ||
| Spring | 851 (29.3) | 101 (31.8) | ||
| Winter | 680 (23.4) | 92 (28.9) | ||
| Body surface area (%) | <10 | 2,279 (78.5) | 248 (78.0) | 0.997 |
| 10 to <20 | 319 (11.0) | 36 (11.3) | ||
| 20 to <30 | 115 (4.0) | 14 (4.4) | ||
| 30 to <50 | 98 (3.4) | 11 (3.5) | ||
| 50 to <70 | 42 (1.4) | 4 (1.3) | ||
| ≥70 | 49 (1.7) | 5 (1.6) | ||
| Blood urea nitrogen (mg/dL) | 13.23±6.00 (2.30~94.20) | 17.38±10.80 (4.30~118.00) | <0.001 | |
| Creatinine (mg/dL) | 0.74±0.35 (0.14~7.71) | 1.08±1.39 (0.28~10.48) | <0.001 | |
| Systolic blood pressure (mmHg) | 110 to <120 | 708 (24.4) | 51 (16.0) | <0.001 |
| 120 to <130 | 992 (34.2) | 93 (29.2) | ||
| ≥130 | 922 (31.8) | 156 (49.1) | ||
| <110 | 280 (9.6) | 18 (5.7) | ||
| Survival | Survived | 2,801 (96.5) | 296 (93.1) | 0.005 |
| Dead | 101 (3.5) | 22 (6.9) | ||
| Length of stay | 21.03±18.65 (1~165) | 31.54±30.64 (1~195) | <0.001 | |
| Number of operation | 0.77±1.90 (0~39) | 1.12±2.01 (0~20) | <0.001 | |
Values are presented as mean±standard deviation (range) or number (%). *Fisher exact test for categorical variables, and Wilcoxon rank sum test or Kruskal-Wallis test for continuous variables.