Table 1 Patients and operation characteristics
|  | Group C (n = 36) | Group G (n = 37) | Group A (n = 38) |
|---|---|---|---|
Age (yr) | 49.5(39.8–56.5) | 55.0(50.5–60.0) | 51.5(43.5–59.0) |
Female, n(%) | 20(55.6) | 19(51.4) | 18(47.4) |
BMI (Kg m− 2) | 24.8(2.7) | 24.8(2.5) | 24.5(3.2) |
ASA classification, n(%) | |||
I | 0(0.0) | 2(5.4) | 0(0.0) |
II | 35(97.2) | 32(86.5) | 35(92.1) |
III | 1(2.8) | 3(8.1) | 3(7.9) |
Mallampati classification, n(%) | |||
I | 14(38.9) | 12(32.4) | 14(36.8) |
II | 22(61.1) | 25(67.6) | 24(63.2) |
Operation duration (min) | 142.5(120.0-197.5) | 150.0(115.0-172.5) | 140.0(108.8–175.0) |
Intubation duration (min) | 208.6(63.9) | 202.4(58.4) | 195.8(60.9) |
Anaesthesia duration (min) | 170.0(140.0-218.8) | 165.0(140.0-197.5) | 167.0(127.8-202.5) |
Cuff inflation volume (ml) | 4.0(4.0–5.0) | 4.0(4.0–5.0) | 4.0(4.0–5.0) |
Initial cuff pressure (cmH2O) |  | 40.0(29.0–50.0) | 38.0(32.0-43.3) |
Tube size, n(%) | |||
7.0 | 20(55.6) | 18(48.6) | 18(47.4) |
7.5 | 16(44.4) | 18(48.6) | 19(50.0) |
8.0 | 0(0.0) | 1(2.7) | 1(2.6) |
Type of Surgery, n(%) | |||
Spinal | 16(44.4) | 17(45.9) | 16(42.1) |
Gynecological | 7(19.4) | 6(16.2) | 7(18.4) |
Neurosurgical | 6(16.7) | 7(18.9) | 5(13.2) |
Urological | 2(5.6) | 2(5.4) | 2(5.3) |
Others | 5(13.9) | 5(13.5) | 8(21.1) |
Surgical position, n(%) | |||
Supine | 15(41.7) | 17(45.9) | 19(50.0) |
Prone | 15(41.7) | 13(35.1) | 13(34.2) |
lithotomy | 3(8.3) | 5(13.5) | 2(5.3) |
Lateral | 3(8.3) | 2(5.4) | 4(10.5) |