Table 2 Measurements of Trachea and main bronchus diameters and measurement reliability
Parameter | Mean ± Standard Deviation | Median (Min-Max) | Measurement Reliability |
|---|---|---|---|
Subcricoid AP (mm) | 18.33 ± 3.68 | 18.20 (8.8–32.8) | Intra-observer ICC: 0.92 (0.88–0.95) Inter-observer ICC: 0.89 (0.84–0.93) |
Subcricoid Transverse (mm) | 18.72 ± 2.76 | 18.80 (12.3–25.4) | Intra-observer ICC: 0.94 (0.90–0.97) Inter-observer ICC: 0.91 (0.87–0.94) |
Subcricoid Area (mm²) | 277.45 ± 95.14 | 272.00 (103.0–663.0) | Intra-observer ICC: 0.91 (0.87–0.94) Inter-observer ICC: 0.88 (0.83–0.92) |
Carina AP (mm) | 20.60 ± 3.95 | 20.40 (11.6–30.8) | Intra-observer ICC: 0.93 (0.89–0.96) Inter-observer ICC: 0.90 (0.86–0.93) |
Carina Transverse (mm) | 20.84 ± 3.79 | 20.60 (12.0–31.1) | Intra-observer ICC: 0.92 (0.88–0.95) Inter-observer ICC: 0.89 (0.85–0.92) |
Carina Area (mm²) | 341.51 ± 113.36 | 338.00 (140.0–646.0) | Intra-observer ICC: 0.90 (0.86–0.93) Inter-observer ICC: 0.87 (0.82–0.91) |
Right Main Bronchus AP (mm) | 14.71 ± 2.87 | 15.00 (7.5–20.2) | Intra-observer ICC: 0.89 (0.85–0.92) Inter-observer ICC: 0.86 (0.81–0.90) |
Right Main Bronchus Area (mm²) | 224.36 ± 72.28 | 232.00 (92.0–392.0) | Intra-observer ICC: 0.88 (0.84–0.91) Inter-observer ICC: 0.85 (0.80–0.89) |
Left Main Bronchus AP (mm) | 13.74 ± 2.65 | 13.70 (6.5–20.0) | Intra-observer ICC: 0.89 (0.85–0.92) Inter-observer ICC: 0.86 (0.81–0.90) |
Left Main Bronchus Area (mm²) | 190.51 ± 67.30 | 200.00 (49.0–375.0) | Intra-observer ICC: 0.87 (0.83–0.90) Inter-observer ICC: 0.84 (0.79–0.88) |
Carinal Angle (degrees) | 71.96 ± 17.40 | 74.00 (32.6–131.5) | Intra-observer ICC: 0.91 (0.87–0.94) Inter-observer ICC: 0.88 (0.83–0.92) |
Thoracic Diameter (mm) | 248.53 ± 21.47 | 249.00 (187.5–293.0) | Intra-observer ICC: 0.95 (0.92–0.97) Inter-observer ICC: 0.92 (0.88–0.95) |