Table 3 Comparisons of radiographic indices between the difficult and easy intubation groups
Difficult (n = 47) | Easy (n = 137) | P value | |
|---|---|---|---|
MHD (mm) | 14.5 ± 6.2 | 16.6 ± 9.5 | 0.080 |
C1C5D (mm) | 103.8 ± 9.6 | 104.1 ± 10.1 | 0.835 |
C1OD (mm) | 7.4 (5.1 to 9.2) | 7.4 (5.3 to 9.4) | 0.720 |
HCD (mm) | 40.4 (36.3 to 44.3) | 39.2 (35.8 to 42.8) | 0.196 |
C1C2D (mm) | 5.1 (3.0 to 7.1) | 4.9 (3.7 to 6.7) | 0.956 |
C1-I-C6 (0) | 52.0 (49.0 to 55.1) | 52.9 (49.5 to 55.4) | 0.296 |
I-C6-C1 (0) | 40.8 (38.7 to 45.0) | 41.6 (38.7 to 45.1) | 0.845 |
I-C1-C6 (0) | 86.9 ± 9.2 | 85.4 ± 8.0 | 0.293 |
C1-I-C6′ (0) | 38.3 (34.8 to 41.2) | 37.7 (34.8 to 42.1) | 0.866 |
I-C6-C1′ (0) | 30.8 (29.2 to 32.5) | 30.8 (27.7 to 33.9) | 0.582 |
I-C1-C6′ (0) | 111.2 (107.2 to 115.6) | 111.8 (104.7 to 117.2) | 0.775 |
TL (mm) | 69.6 (65.7 to 76.2) | 69.8 (64.5 to 74.2) | 0.634 |
TH (mm) | 36.9 ± 4.6 | 37.2 ± 5.3 | 0.743 |
TA (cm2) | 19.4 ± 4.0 | 19.3 ± 3.3 | 0.810 |
EL (mm) | 18.5 ± 2.2 | 18.6 ± 2.3 | 0.810 |
EPD (mm) | 7.0 (5.3 to 9.1) | 6.6 (4.8 to 8.2) | 0.205 |
EA (0) | 31.1 ± 9.6 | 34.0 ± 11.4 | 0.126 |
CVLVC (n) | 0.315 | ||
C4 level | 6 (12.8%) | 14 (10.2%) | |
C5 level | 38 (80.9%) | 107 (78.1%) | |
C6 level | 3 (6.4%) | 16 (11.7%) | |
SVD (mm) | 30.6 ± 4.9 | 29.4 ± 5.4 | 0.200 |
SED (mm) | 49.5 ± 7.4 | 47.4 ± 6.3 | 0.059 |
SGD (mm) | 12.2 (10.5 to 14.2) | 11.5 (9.5 to 13.3) | 0.131 |