Skip to main content
. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: J Comput Assist Tomogr. 2015 Jul-Aug;39(4):584–590. doi: 10.1097/RCT.0000000000000238

Table 5.

Airway Measurements by Field of View and Airway Size

Airway
Metric		 Airway
Size		 Mean Value ± SD
30 cm FOV 15 cm FOV 10 cm FOV ANOVA
p-value1 		10 cm vs. 30
cm p-value2 		15 cm vs. 30
cm
p-value2 		10 cm vs. 15
cm
p-value2
WT (mm) Large 1.425 ± 0.161 1.398 ± 0. 0.176 1.396 ± 0.186 <.0001 <.0001 <.0001 0.8930
Small 1.260 ± 0.113 1.229 ± 0.125 1.219 ± 0.125 <.0001 <.0001 <.0001 0.0374
WA (mm2) Large 25.873 ± 4.497 25.139 ± 4.724 25.150 ± 5.007 0.0001 0.0007 0.0006 0.9978
Small 14.181 ± 2.510 13.815 ± 2.590 13.600 ± 2.644 <0.0001 <.0001 0.0024 0.1042
WA%3 Large 64.047 ± 3.611 64.043 ± 3.648 63.888 ± 3.826 0.5392 n/a n/a n/a
Small 77.708 ± 2.014 76.891 ± 2.119 76.800 ± 2.134 <.0001 <.0001 <.0001 0.8175
Pi10 (mm) Large 4.399 ± 0.333 4.348 ± 0.355 4.328 ± 0.387 0.0026 0.0023 0.0382 0.5658
Small 4.538 ± 0.281 4.449 ± 0.312 4.437 ± 0.309 <.0001 <.0001 <.0001 0.7864
ID (mm) Large 4.115 ± 0.363 4.125 ± 0.328 4.128 ± 0.357 0.8115 n/a n/a n/a
Small 2.151 ± 0.224 2.162 ± 0.196 2.167 ± 0.210 0.5768 n/a n/a n/a
1

Overall test of 10 cm FOV vs. 15 cm FOV vs. 30 cm FOV at specified airway size (large or small)

2

Pairwise comparison using Tukey’s correction at specified airway size (large or small)

3

WA% is dimensionless and calculated as follows: WA/total area (TA) × 100