Table 2.
Summary of Mixed Model1 Results Allowing for Anatomic Level by Experimental Condition Interaction
| Condition => | Anesthesia No Advancement vs. Awake | Anesthesia 50% Advancement vs. Awake | Anesthesia Max Advancement vs. Awake | Location by Treatment Interaction2 | ||||
|---|---|---|---|---|---|---|---|---|
| Variable | Location/Level | Est. Diff. LS Means | (SE) | Est. Diff. LS Means | (SE) | Est. Diff. LS Means | (SE) | p-value |
| Airway Area | Soft Palate | −51.3 | 41.8 | −29.0 | 39.1 | 30.8 | 39.1 | 0.74 |
| Uvula | −121.3 | 41.8 | −79.0 | 39.1 | 8.6 | 39.1 | ||
| Tip of the Epiglottis | −127.8 | 41.8 | −83.9 | 39.1 | 9.1 | 39.1 | ||
| Base of the Epiglottis | −72.9 | 41.8 | −41.3 | 39.1 | 7.3 | 39.1 | ||
| AP Diameter | Soft Palate | −2.1 | 1.5 | −1.6 | 1.4 | −0.4 | 1.4 | 0.05 |
| Uvula | −6.6 | 1.5 | −3.9 | 1.4 | −0.8 | 1.4 | ||
| Tip of the Epiglottis | −6.1 | 1.5 | −4.2 | 1.4 | −2.2 | 1.4 | ||
| Base of the Epiglottis | −2.3 | 1.5 | −2.0 | 1.4 | −1.0 | 1.4 | ||
| LAT Diameter | Soft Palate | −0.6 | 2.5 | 0.1 | 2.4 | 4.3 | 2.4 | 0.05 |
| Uvula | −6.3 | 2.5 | −4.9 | 2.4 | 1.4 | 2.4 | ||
| Tip of the Epiglottis | −7.2 | 2.5 | −6.1 | 2.4 | 0.2 | 2.4 | ||
| Base of the Epiglottis | −0.3 | 2.5 | 1.0 | 2.4 | 0.2 | 2.4 | ||
1
Notes: The mixed model analysis of variance included fixed effects for anatomic location, experimental treatment, and location by treatment interaction. Subject was included as a random effect to account for biological variability among subjects.
2
Results for interaction tests were F(9,90)=0.7, p=0.74; F(9,90)=2.0, and p=0.05; F(9,90)=2.0, p=0.05 for airway area, anteroposterior (AP) airway diameter, and lateral (LAT) airway diameter, respectively
Est. Diff LS Means = estimated difference of least square means