Table 1.
Baseline demographics of the participants.
| Characteristic | PNB group (n = 40) | Control group (n = 40) | P |
|---|---|---|---|
| Age (years), mean ± SD | 47.30 ± 13.18 | 49.20 ± 12.62 | 0.512 |
| Male, n (%) | 18 (45.0%) | 21 (52.5%) | 0.502 |
| BMI (kg/m2), mean ± SD | 21.66 ± 2.43 | 21.03 ± 3.02 | 0.301 |
| Operation time (min), mean ± SD | 84.30 ± 5.68 | 86.00 ± 13.99 | 0.480 |
| Snoring, n (%) | 13 (32.5%) | 12 (30.0%) | 0.809 |
| Mild respiratory dysfunction, n (%) | 20 (50.0%) | 18 (45.0%) | 0.654 |
| Increased respiratory secretions, n (%) | 13 (32.5%) | 15 (37.5%) | 0.639 |
| ASA I, n (%) | 12 (30.0%) | 10 (25.0%) | 0.617 |
| Previous thoracic surgery (%) | 0 (0.0%) | 0 (0.0%) | 1 |
BMI body mass index, PNB phrenic nerve block, SD standard deviation.