Table 1 Comparison of patients’ characteristics according to the age
Variable | Total (n = 1876) | Age < 60 (n = 723) | 60 ≤ Age < 80 (n = 867) | Age ≥ 80 (n = 286) | P-value |
|---|---|---|---|---|---|
Age, mean years (SD) | 62.7 (16.2) | 45.6 (9.9) | 69.9 (5.7) | 84.0 (3.6) | < 0.001 |
Female, n (%) | 809 (43.1) | 325 (45.0) | 324 (37.4) | 160 (55.9) | < 0.001 |
BMI, mean kg/m2 (SD) | 24.8 (3.6) | 25.5 (3.8) | 24.7 (3.2) | 23.0 (3.4) | < 0.001 |
Charlson age comorbidity index, n (%) |  |  |  |  | < 0.001 |
  0–5   ≥ 6 | 1766 (94.1) 110 (5.9) | 723 (100.0) 0 (0.0) | 836 (96.4) 31 (3.6) | 207 (72.4) 79 (27.6) |  |
ASA PS classification, n (%) |  |  |  |  | < 0.001 |
  1–2 | 1364 (72.7) | 679 (93.9) | 573 (66.1) | 112 (39.2) |  |
  3–5 | 512 (27.3) | 44 (6.1) | 294 (33.9) | 174 (60.8) |  |
Previous abdominal surgery (+), n (%) | 336 (17.9) | 137 (18.9) | 151 (17.4) | 48 (16.8) | 0.631 |
Severity according to the TG 18, n (%) |  |  |  |  | < 0.001 |
  Grade I | 1374 (73.2) | 611 (84.5) | 592 (68.3) | 171 (59.8) |  |
  Grade II | 435 (23.2) | 109 (15.1) | 236 (27.2) | 90 (31.5) |  |
  Grade III | 67 (3.6) | 3 (0.4) | 39 (4.5) | 25 (8.7) |  |
Acalculous cholecystitis on preoperative imaging, n (%) | 520 (27.7) | 164 (22.7) | 256 (29.5) | 100 (35.0) | < 0.001 |
Combined CBD stone on preoperative imaging, n (%) | 353 (18.8) | 113 (15.6) | 169 (19.5) | 71 (24.8) | 0.003 |
Preoperative laboratory findings | Â | Â | Â | Â | Â |
  WBC, mean 103/mm3 (SD) | 11.7 (5.2) | 10.9 (4.5) | 12.2 (5.6) | 12.6 (5.4) | < 0.001 |
  Hemoglobin, mean g/dL (SD) | 13.4 (1.7) | 13.9 (1.7) | 13.3 (1.6) | 12.5 (1.8) | < 0.001 |
  Platelet, mean 103/mm3 (SD) | 223.8 (72.3) | 242.7 (66.0) | 211.9 (72.9) | 211.8 (76.1) | < 0.001 |
  PT, mean INR (SD) | 1.11 (0.17) | 1.07 (0.12) | 1.12 (0.15) | 1.16 (0.28) | < 0.001 |
  Creatinine, mean mg/dL (SD) | 0.95 (0.61) | 0.82 (0.52) | 1.01 (0.67) | 1.07 (0.58) | < 0.001 |
  Albumin, mean g/dL (SD) | 3.70 (0.58) | 4.01 (0.48) | 3.59 (0.54) | 3.21 (0.47) | < 0.001 |
  AST, mean IU/L (SD) | 129.8 (273.9) | 119.1 (247.1) | 132.2 (300.4) | 149.6 (252.7) | 0.263 |
  ALT, mean IU/L (SD) | 104.7 (191.1) | 115.1 (201.2) | 99.8 (197.0) | 93.1 (138.7) | 0.152 |
  Total bilirubin, mean mg/dL (SD) | 1.77 (1.83) | 1.60 (1.74) | 1.87 (1.94) | 1.88 (1.69) | 0.007 |
  CRP, mean mg/dL (SD) | 8.68 (10.34) | 5.98 (8.98) | 9.88 (10.70) | 11.42 (10.84) | < 0.001 |
Preoperative PTGBD, n (%) | 1020 (54.4) | 271 (37.5) | 529 (61.0) | 220 (76.9) | < 0.001 |