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. 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 3.

Baseline Demographics

Variable Normal
(n=13)		 Non-severe
Asthma (n=7)		 Severe
Asthma
(n=9)		 All Groups
(n=29)		 p-value1
Age at Enrollment (years) 24.9 ± 6.8 30.4 ± 14.8 45.9 ± 7.6 32.7 ± 13.0 <0.0012
BMI (kg/m2) 26.4 ± 6.0 27.0 ± 5.0 31.3 ± 5.8 28.0 ± 5.9 0.14
Duration of Asthma (years) n/a 18.2 ± 14.2 22.1 ± 15.6 20.4 ± 15.2 0.63
Race White, % (n) 46.2 (6) 100.0 (7) 77.8 (7) 69.0 (20) 0.13
Black, % (n) 38.5 (5) 0 22.2 (2) 24.1 (7)
Other, % (n) 15.4 (2) 0 0 6.9 (2)
Gender Male, % (n) 61.5 (8) 71.4 (5) 66.7 (6) 65.5 (19) 1.00
Female, % (n) 38.5 (5) 28.6 (2) 33.3 (3) 34.5 (10)
FEV1, L,(% predicted) Pre-BD 3.97 ± 0.66
(102.6 ± 9.4)		 4.17 ± 1.04
(99.9 ± 12.3)		 2.20 ± 0.57
(64.5 ± 17.1)		 3.47 ± 1.13
(90.1 ± 21.4)		 <0.0013
(<0.001 4)
Post-BD 4.15 ± 0.71
(106.5 ± 9.9)		 4.57 ± 1.06
(109.3 ± 11.0)		 2.43 ± 0.63
(71.2 ± 18.0)		 3.71 ± 1.17
(96.2 ± 21.3)		 <0.0015
(<0.001 6)
1

Comparison among all groups using analysis of variance for continuous measures or Fisher’s exact test for categorical measures

2

Uncorrected pairwise comparisons: Non-severe vs. Normal p=0.22, Severe vs. Normal p=<0.0001, Non-severe vs. Severe p= 0.003.

3

Pairwise comparison using Tukey’s correction: Non-severe vs. Normal p=0.84, Severe vs. Normal p=<0.0001, Non-severe vs. Severe p <0.001.

4

Pairwise comparison using Tukey’s correction: Non-severe vs. Normal p=0.89, Severe vs. Normal p=<0.0001, Non-severe vs. Severe p <0.001.

5

Pairwise comparison using Tukey’s correction: Non-severe vs. Normal p=0.49, Severe vs. Normal p=<0.0001, Non-severe vs. Severe p <0.001.

6

Pairwise comparison using Tukey’s correction: Non-severe vs. Normal p=0.89, Severe vs. Normal p=<0.0001, Non-severe vs. Severe p <0.001.