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. Author manuscript; available in PMC: 2016 Oct 20.
Published in final edited form as: J Magn Reson Imaging. 2013 Oct 7;39(1):77–84. doi: 10.1002/jmri.24104

Table 1.

Demographic and spirometric data for all subjects.

Variable Control
(n=29)		 Exposure-to-
secondhand-
smoke
(n=37)		 Smoker
(n=23)		 P value
Ho2 Ho3
Pairwise Comparison
Gender 12M, 17F 9M, 28F 7M, 16F 0.331
Age (yrs)1 57.3±9.0 58.9±8.3 61.0±8.3 0.324
Height (cm)1 168.4±8.1 164.4±8.6 167.6±8.4 0.135
Weight (kg)1 78.4±12.8 74.5±14.9 70.4±16.6 0.159
BMI1 27.5±3.2 27.5±4.9 25.0±5.6 0.148
FEV1%predicted1 98.7±9.1 98.6±11.7 77.0±25.1 <0.001 Cont vs. ESS
Cont vs. Smok6
ESS vs. Smok		 0.981
<0.001
<0.001
FEV1/FVC1 78.5±4.1 77.7±4.3 64.2±15.2 <0.001 Cont vs. ESS
Cont vs. Smok
ESS vs Smok		 0.436
<0.001
<0.001
1

Values are mean±SD (standard deviation).

2

Ho: Null Hypothesis: Categorical: Homogenous proportions. Continuous: All means equal.

3

Ho: Null Hypothesis: Equal means.

4

Cont: Control.

5

ESS: Exposure-to-secondhand-smoke.

6

Smok: Smoker.