Table 1 Baseline patient characteristics
Masked group (n = 20) | Control group (n = 18) | P-value | |
|---|---|---|---|
Age (years) | 56.8 ± 14.5 | 52.2 ± 18.1 | 0.392 |
Sex (male/female) | 11/9 | 9/9 | 0.758 |
Height (cm) | 160.4 ± 8.2 | 161.8 ± 11.0 | 0.650 |
Weight (kg) | 65.8 ± 8.9 | 72.9 ± 16.7 | 0.106 |
ASA PS classification (I/II) | 10/10 | 7/11 | 0.492 |
Bupivacaine dose (mg) | 12.6 ± 1.2 | 12.9 ± 1.3 | 0.331 |
Sensory block level [n (%)] | 0.907 | ||
Below T7 | 3 (15.0) | 4 (22.2) | |
T7‒T9 | 5 (25.0) | 5 (27.8) | |
Above T9 | 12 (60.0) | 9 (50.0) | |
Baseline BIS | 94.2 ± 3.5 | 93.9 ± 4.8 | 0.806 |
Operation time, total (min) | 71.1 ± 37.7 | 65.3 ± 47.0 | 0.443 |
Type of surgery | |||
Knee arthroplasty [n (%)] | 7 (35.0) | 4 (22.2) | 0.386 |
Other orthopedic surgery [n (%)] | 11 (55.0) | 12 (66.7) | 0.463 |
Urological surgery [n (%)] | 2 (10) | 2 (11.1) | 0.656 |