| Characteristics | Fentanyl (n = 57) | Lidocaine (n = 57) | P-value | ||
| Sex | Female (n, %) | 35 (61.4) | 38 (66.7) | 0.558 | |
| Male (n, %) | 22 (38.6) | 19 (33.3) | |||
| Age (years) (mean ± SD) | 38.5 ± 12.53 | 39.19 ± 12.45 | 0.776 | ||
| Weight (kg) (mean ± SD) | 68.9 ± 8.3 | 67.9 ± 8.5 | 0.53 | ||
| ASA | I (n, %) | 37 (64.9) | 37 (64.9) | 0.32 | |
| II (n, %) | 20 (35.1) | 20 (35.1) | |||
| Mallapatti classification | I (n, %) | 42 (73.3) | 42 (73.3) | 0.33 | |
| II (n, %) | 15 (26.3) | 15 (26.3) | |||
| Induction agent | Propofol (n, %) | 30 (52.6) | 32 (56.1) | 0.50 | |
| Thiopental (n, %) | 27 (47.4) | 25 (43.9) | |||
| Surgical procedure | GI surgery (n, %) | 23 (40.4) | 15 (26.3) | 0.372 | |
| Gynecology (n, %) | 17 (29.8) | 16 (28.1) | |||
| ENT (n, %) | 4 (7) | 7 (12.3) | |||
| Urology (n, %) | 5 (8.8) | 10 (17.5) | |||
| Other (n, %) | 8 (14) | 9 (15.8) | |||