Table 2 Comparison of weight-standardized expiratory tidal volumes controlling for device randomization order
| Variable | Guedel vs. AOA | p-value |
|---|---|---|
| Expiratory tidal volume |
Mean diff = 0.452 (ml/kg) CI = (0.335 to 0.568) | |
| Inspiratory tidal volume |
Mean diff = −0.109 (ml/kg) CI = (− 0.261 to 0.044) | |
| Ease of placement |
aOdds ratio = 0.136 CI = (0.007 to 2.684) | 0.24 |
| Normal expiratory waveform |
Odds ratio = 1.772 CI = (0.650 to 4.832) | 0.26 |
| Blood on 1st device (Guedel 1st vs. 2nd) |
Odds ratio = 7.793 CI = (0.384 to 157.972) | 0.24 |