Table 4 Mean airway proportions using cricoid area and age appropriate endotracheal tube size area as the denominators and their comparison p values. ACR = airway/cricoid area ratio and AER = airway/ETT area ratio.
From: Airway sizes and proportions in children quantified by a video-bronchoscopic technique
| Â | Cricoid | RMS | RBI | RLL | LMS | LLL | LUL |
|---|---|---|---|---|---|---|---|
n | 125 | 114 | 100 | 90 | 108 | 97 | 89 |
ACR | 1.00 | 0.85 | 0.73 | 0.55 | 0.68 | 0.48 | 0.42 |
AER | 1.20 | 1.00 | 0.87 | 0.60 | 0.80 | 0.54 | 0.47 |
p-value | 0.0001 | 0.0001 | 0.0001 | 0.0001 | 0.0001 | 0.0001 | 0.0001 |