Table 2 Comparisons of general characteristics and airway-related variables between the difficult and easy intubation groups
Difficult (n = 47) | Easy (n = 137) | P value | |
|---|---|---|---|
Male (n) | 31 (66.0%) | 93 (67.9%) | 0.808 |
Age (yr) | 57.8 ± 12.1 | 54.5 ± 14.0 | 0.154 |
Weight (kg) | 70.5 ± 11.5 | 67.0 ± 12.7 | 0.103 |
Height (cm) | 166.0 (158.5 to 171.0) | 164.0 (156.0 to 171.0) | 0.253 |
BMI (kg m−2) | 26.5 ± 3.0 | 24.6 (3.5) | 0.001 |
BMI > 25 kg m− 2 | 33 (70.2%) | 60 (43.8%) | 0.002 |
BMI > 30 kg m− 2 | 8 (17.0%) | 8 (5.8%) | 0.019 |
ASA physical status (n) | 0.334 | ||
1 | 18 (38.3%) | 60 (43.8%) | |
2 | 23 (48.9%) | 66 (48.2%) | |
3 | 6 (12.8%) | 11 (6.0%) | |
Co-morbidity (n) | |||
Diabetes | 10 (21.3%) | 21 (15.3%) | 0.347 |
Hypertension | 16 (34.0%) | 40 (29.2%) | 0.533 |
Cardiac | 1 (2.1%) | 6 (4.4%) | 0.680 |
Pulmonary | 2 (4.3%) | 3 (2.2%) | 0.603 |
Neurologic | 4 (8.5%) | 6 (4.4%) | 0.280 |
Hepatic | 0 (0.0%) | 9 (6.6%) | 0.114 |
Renal | 1 (2.1%) | 4 (2.9%) | 1.000 |
Thyroid | 0 (0.0%) | 2 (1.5%) | 1.000 |
Rheumatoid arthritis | 3 (6.4%) | 4 (2.9%) | 0.374 |
Diagnosis (n) | |||
Degenerative | 37 (78.7%) | 103 (75.2%) | 0.623 |
Tumor | 7 (14.9%) | 29 (21.4%) | 0.349 |
Trauma | 1 (2.1%) | 0 (0.0%) | 0.255 |
Congenital | 2 (4.3%) | 5 (3.6%) | 1.000 |
Operation site (n) | 0.961 | ||
Above C2 | 7 (14.9%) | 20 (14.6%) | |
Below C3 | 40 (85.1%) | 117 (85.4%) | |
Mallampati score (n) | 0.084 | ||
1 | 8 (17.0%) | 37 (27.0%) | |
2 | 20 (42.6%) | 58 (42.3%) | |
3 | 15 (31.9%) | 37 (27.0%) | |
4 | 4 (8.5%) | 5 (3.6%) | |
Retrognathia (n) | 2 (4.3%) | 1 (0.7%) | 0.161 |
TMD (mm) | 80.0 (70.0 to 90.0) | 80.0 (70.0 to 90.0) | 0.485 |
RHTMD | 20.9 (18.9 to 23.4) | 21.0 (18.4 to 23.2) | 0.785 |
SMD (mm) | 122.0 (104.0 to 150.0) | 150.0 (130.0 to 170.0) | 0.001 |
IIG (mm) | 40.0 (35.0 to 45.0) | 43.0 (40.0 to 50.0) | 0.006 |
Excessive oral secretions (n) | 5 (10.6%) | 4 (2.9%) | 0.049 |
Loose upper or lower incisor (n) | 0 (0.0%) | 3 (2.2%) | 0.571 |