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Demographic and perioperative characteristics
| Characteristics | Control | TENS | P |
|---|---|---|---|
| Patients (n) | 25 | 25 | - |
| Age (years) | 54 (33) | 49 (23) | 0.07 |
| Body mass index | 25.8±1.8 | 25.2±2.3 | 0.38 |
| ASA status (I/II) | 11/14 | 10/15 | 0.72 |
| Duration of operation (min) | 100 (40) | 100 (30) | 0.97 |
Data are presented as mean±SD, median (range) or number. TENS: transcutaneous electrical nerve stimulation, ASA: the American Society of Anesthesiologists
