Reliability of Chest Wall Mobility and Its Correlation with Lung Functions in Healthy Nonsmokers, Healthy Smokers, and Patients with COPD

Table 2

Chest expansion values and difference between the groups.

		Examiner A, first assessment		Examiner A, second assessment		Examiner B, first assessment		Examiner B, second assessment
		Upper CE (cm)	Lower CE (cm)	Upper CE (cm)	Lower CE (cm)	Upper CE (cm)	Lower CE (cm)	Upper CE (cm)	Lower CE (cm)
Healthy nonsmokers	Mean	5.6	7.0	5.6	7.2	6.1	7.2	6.4	7.5
	SD	1.8	2.0	1.5	1.8	1.7	1.9	1.7	2.0
	Variance	3.4	2.0	2.4	2.5	3.1	2.9	3.0	2.3
	Minimum	2.1	2.5	2.2	2.6	2.4	2.6	2.3	2.5
	Maximum	8.9	11	9.0	10.8	9.9	10.8	9.0	11.0
Healthy smokers	Mean	5.4	7.7	5.9	7.5	5.9	7.6	5.5	8.0
	SD	0.8	2.6	0.8	1.6	0.8	1.5	1.0	1.2
	Variance	0.7	2.0	0.7	2.6	0.7	2.3	1.0	1.6
	Minimum	4.1	6.0	5.0	5.0	5.0	5.0	4.1	6.0
	Maximum	7.3	10.3	8.0	11.0	7.7	11.0	7.9	10.8
COPD	Mean	3.7	4.9	4.2	4.8	4.3	5.2	4.4	4.7
	SD	0.8	1.4	1.0	1.8	1.3	2.2	1.6	2.6
	Variance	0.7	2.1	1.1	2.4	1.7	2.5	2.7	1.8
	Minimum	1.8	2.1	1.6	2.2	1.8	2.2	2.0	2.1
	Maximum	4.9	8.0	5.8	7.8	6.2	8.6	6.3	7.4
p value		<0.001	<0.001	<0.001	<0.001	0.001	<0.001	0.040	0.011