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Patient characteristics
| Acute cholecystitis (n = 100) | |
| Mean age (yr ± SD) | 66.8 ± 14.4 |
| Sex | |
| Male | 51 |
| Female | 49 |
| Mean BMI (kg/m2 ± SD) | 23.9 ± 3.3 |
| History of abdominal surgery | 26 (26%) |
| Suspected choledocholithiasis | 41 (41%) |
| Mean time from onset (d ± SD) | 7.7 ± 4.1 |
| TG13 severity grading | |
| Grade I(mild) | 86 (86%) |
| Grade II (moderate) | 14 (14%) |
SD: Standard deviation; BMI: Body mass index; TG13: Updated Tokyo Guidelines.
