Table 1 Demographics of the study patients
Patient characteristics | N (%) | N (%) |
|---|---|---|
Electrocautery dissection (n = 148) | Ultrasonic dissection (n = 152) | |
Sex | ||
Male | 68 (45.9) | 87 (57.2) |
Female | 80 (54.1) | 65 (42.8) |
Age, years | ||
< 25 | 3 (2.0) | 1 (0.7) |
25–49 | 35 (23.6) | 34 (22.4) |
50–74 | 89 (60.1) | 87 (57.2) |
≥ 75 | 21 (14.2) | 30 (19.7) |
ASA grade | ||
1 | 49 (33.1) | 35 (23.0) |
2 | 81 (54.7) | 81 (53.3) |
2–3 | 18 (12.2) | 34 (22.4) |
4 | N/A | 2 (1.3) |
5 | N/A | N/A |
BMI (Mean, range) * | 29 (18—43) | 30 (18—52) |
Missing | 7 (4.7) | 9 (5.9) |
Previous cholecystitis | 9 (6.1) | 12 (7.9) |
Duration of symptoms** | ||
1 | 23 (15.5) | 16 (10.5) |
2 | 26 (17.6) | 35 (23.0) |
3 | 25 (16.9) | 46 (30.3) |
4 | 23 (15.5) | 21 (13.8) |
5 | 19 (12.8) | 11 (7.2) |
> 5 | 12 (8.2) | 6 (4.0 |
Missing | 20 (13.5) | 17 (11.2) |
Preoperative grade of cholecystitis (Tokyo guidelines, TG) * | ||
Mild, TG 1 | 60 (40.5) | 56 (36.8) |
Moderate, TG 2 | 85 (57.4) | 96 (63.2) |