Airway calibre measures for pregnant and nonpregnant females
| Nonpregnant# | Pregnant# | Differences | p-value | ||
| Mean | 95% CI | ||||
| Upper airway seated | |||||
| OPJ cm2 | 1.39±0.05 | 1.27±0.04 | 0.12 | 0.008–0.25 | <0.04 |
| Ap,mean cm2 | 1.84±0.05 | 1.70±0.05 | 0.14 | 0.001–0.28 | <0.05 |
| Vp cm3 | 20.15±0.72 | 18.66±0.55 | 1.49 | −0.30–3.28 | 0.10 |
| Upper airway supine | |||||
| OPJ cm2 | 1.15±0.04 | 1.07±0.03 | 0.08 | −0.01–0.17 | 0.09 |
| Ap,mean cm2 | 1.62±0.04 | 1.51±0.03 | 0.11 | 0.01–0.22 | <0.03 |
| Vp cm3 | 17.54±0.54 | 16.35±0.49 | 1.19 | −0.26–2.63 | 0.10 |
| Upper airway lateral | |||||
| OPJ cm2 | 1.23±0.03 | 1.17±0.03 | 0.06 | −0.03–0.15 | 0.18 |
| Ap,mean cm2 | 1.71±0.04 | 1.58±0.04 | 0.13 | 0.02–0.24 | 0.02 |
| Vp cm3 | 18.33±0.52 | 17.40±0.56 | 0.93 | −0.57–2.43 | 0.22 |
| Change from the seated to supine posture | |||||
| OPJ % | 12±4 | 9±3 | 2 | −8–12 | 0.63 |
| Ap,mean % | 9±3 | 6±3 | 3 | −5–11 | 0.46 |
| Vp % | 7±3 | 6±4 | 2 | −9–12 | 0.78 |
Data are presented as mean±sem, unless otherwise stated. CI: confidence interval; OPJ: oropharyngeal junction; Ap,mean: mean pharyngeal cross-sectional area; Vp: pharyngeal volume. #: n = 100.