Table 1 Patient baseline characteristics
Characteristic | Nasal cannula group (73) | Nasal mask group (73) | p value |
|---|---|---|---|
Age, years | 49 (37–54) | 51 (39–56) | 0.112 |
Sex, n (%) | Â | Â | 0.856 |
 Male | 51 (69.9) | 52 (71.2) |  |
 Female | 22 (30.1) | 21 (28.8) |  |
BMI, kg/m2, n (%) | Â | Â | 0.857 |
 25–29.9 | 52 (71.2) | 50 (68.5) |  |
 30–39.9 | 21 (28.8) | 23 (31.5) |  |
ASA classification, n (%) | Â | Â | 0.812 |
 1 | 11 (15.1) | 12 (16.4) |  |
 2 | 61 (83.5) | 59 (80.9) |  |
 3 | 1 (1.4) | 2 (2.7) |  |
Mallampati score, n (%) | Â | Â | 0.232 |
 1 | 9 (12.3) | 7 (9.6) |  |
 2 | 26 (35.6) | 36 (49.3) |  |
 3 | 30 (41.1) | 27 (37) |  |
 4 | 8 (11.0) | 3 (4.1) |  |
Medical history, n (%) | Â | Â | 0.593 |
 Hypertension | 19 (26.0) | 24 (32.9) |  |
 Diabetes | 5 (6.8) | 6 (8.2) |  |
 Coronary artery disease | 3 (4.1) | 1 (1.4) |  |
 SpO2 in ambient air before pre-oxygenation | 98 (97–98) | 98 (97–98) | 0.942 |
 Propofol, mg | 140 (130–155) | 140 (130–150) | 0.810 |
 Sufentanil, μg | 5 (5–5) | 5 (5–5) | 1 |
 Duration of procedure, min | 5 (4–6) | 5 (4–6) | 0.442 |
 Time to open eyes, min | 1 (0–2) | 0 (0–1) | 0.211 |
 Time of recovery of orientation force, min | 2 (1–3) | 2 (1–3) | 0.455 |