Demographics of the study cohort and routine blood test results
| Overall | NSAP* | Uncomplicated† | Complicated‡ | Others | P values | |
| N (%) | 289 (100) | 47 (16.3) | 64 (22.1) | 115 (39.8) | 63 (21.8) | |
| Gender (n, (%)) | ||||||
| Male | 88 (30.4) | 3 (6.4) | 9 (14.1) | 53 (46.1) | 23 (36.5) | <0.001§ |
| Female | 201 (69.6) | 44 (93.6) | 55 (85.9) | 62 (53.9) | 40 (63.5) | |
| Age (years) | ||||||
| Median | 51.3 | 41.3 | 46.4 | 56.6 | 52.2 | <0.001¶ |
| IQR | 37.5–67.4 | 26.7–57.3 | 29.8–61.8 | 44.6–68.5 | 39.3–67.5 | |
| 95% CI | 49.3 to 53.5 | 37.9 to 49.4 | 42.7 to 51.7 | 53.1 to 59.4 | 48.2 to 56.6 | |
| Underwent operation (n, (%)) | ||||||
| Yes | 276 (44.6) | 2 (4.3) | 37 (57.8) | 88 (76.5) | 2 (3.2) | <0.001§ |
| No | 160 (55.4) | 45 (95.7) | 27 (42.2) | 27 (23.5) | 61 (96.8) | |
| Duration from index presentation to operation (days) | ||||||
| Median | 3.0 | 1.5 | 4.0 | 3.0 | 24.0 | 0.067¶ |
| IQR | 2.0–5.5 | 1.0 | 2.0–7.5 | 2.0–4.8 | 5.0 | |
| 95% CI | 7.6 to 17.6 | −4.9 to 7.9 | 4.1 to 25.2 | 5.8 to 17.6 | −217.4 to 265.4 | |
| Total bilirubin (µmol/L) | ||||||
| Median | 14.0 | 11.0 | 22.5 | 17.0 | 11.0 | <0.001¶ |
| IQR | 8.0–31.5 | 7.0–15.0 | 10.3–46.8 | 9.0–35.0 | 7.0–33.0 | |
| 95% CI | 24.3 to 32.7 | 10.2 to 14.2 | 25.9 to 44.1 | 23.3 to 35.6 | 19.8 to 44.6 | |
| Alanine aminotransferase, ALT (U/L) | ||||||
| Median | 36.0 | 23.0 | 135.0 | 38.0 | 41.0 | <0.001¶ |
| IQR | 19.0–169.5 | 14.0–29.0 | 23.5–359.0 | 20.0–178.0 | 18.0–100.0 | |
| 95% CI | 119.2 to 174.1 | 20.9 to 32.2 | 175.7 to 336.5 | 106.6 to 185.2 | 71.4 to 181.5 | |
| Alkaline phosphatases, ALP (U/L) | ||||||
| Median | 96.0 | 76.0 | 139.5 | 94.0 | 94.0 | <0.001¶ |
| IQR | 71.0–172.5 | 60.0–103.0 | 86.0–264.0 | 70.0–158.0 | 74.0–238.0 | |
| 95% CI | 137.9 to 172.0 | 75.2 to 101.3 | 153.1 to 223.0 | 121.7 to 170.5 | 135.8 to 238.7 | |
| Gamma-glutamyltranspeptidase, GGT (U/L) | ||||||
| Median | 87.0 | 25.0 | 238.0 | 114.5 | 74.0 | <0.001¶ |
| IQR | 30.0–389.5 | 14.0–54.0 | 55.0–457.5 | 39.3–392.5 | 30.0–497.8 | |
| 95% CI | 211.4 to 312.7 | 24.9 to 54.5 | 236.5 to 422.1 | 178.9 to 358.3 | 187.4 to 437.3 | |
*Non-specific abdominal pain.
†Biliary colic, aseptic choledocholithiasis.
‡Cholecystitis, cholangitis, gallstone pancreatitis.
§Pearson’s χ2 test (for ‘gender’ and ‘underwent operation’).
¶Kruskal-Wallis test and Dunn’s multiple comparison test (for ‘age’, ‘duration from index presentation to operation’, ‘total bilirubin’, ‘ALT’, ‘ALP’ and ‘GGT’).
NSAP, non-specific abdominal pain.