Conversely, other investigators have presented
results showing that aNR was not a significant risk factor
in the severity of OSAS in adults.20 Their rhinomanometry
was performed in the seated posture during
wakefulness. De Vito et al.21 also analyzed AAR data
obtained from both the seated and supine position. However,
they could not find any statistical significance
between aNR and the severity of OSAS in the middleaged
population. In a recent study of awake adults with
OSAS, Masdeu and colleagues22 utilized AAR and acoustic
rhinometry, which provides a cross-sectional area profile
of the nasal passages. They compared these in both
a supine and seated posture, but they did not find a correlation
between either of these two measurements and
the severity of OSAS.