Table 2.

Correlation of lung volume reduction with gender, BMI and total lung capacity (n = 15)

A. D I A P H R A G M A T I C S H I F T
	Degrees of freedom	F-statistic	p-value
Moderate inspiration:
Gender	8.4	0.01	0.918
BMI	10.7	3.88	0.075
Total lung capacity	7.5	0.12	0.742
Maximum inspiration:
Gender	11.2	5.63	0.037*
BMI	11.5	8.85	0.012*
Total lung capacity	11.0	12.60	0.005*
Table 2B
B. L U N G V O L U M E
	Degrees of freedom	F-statistic	p-value
Moderate inspiration:
Gender	10.9	0.08	0.781
BMI	11.0	0.10	0.758
Total lung capacity	10.9	0.54	0.479
Maximum inspiration:
Gender	11.0	0.05	0.823
BMI	11.0	0.41	0.536
Total lung capacity	11.0	0.20	0.664

BMI, body mass index.

Random coefficient regression summary for a model that includes: gender, BMI, and total lung capacity as predictors of diaphragmatic shift (A) and reduction in lung volume (B) with moderate and maximum inspiratory breath-hold positions. Regarding the diaphragmatic shift on moderate inspiration and the pulmonary volume reduction on both moderate and maximum inspiration neither of the examined factors demonstrated any statistically significant correlation with the magnitude of diaphragmatic shift and lung volume reduction respectively. However regarding the diaphragmatic shift on maximum inspiration the female gender (p = 0.037) and total lung capacity (p = 0.005) were positively associated with the magnitude of the diaphragmatic shift (p = 0.037), while a higher BMI was negatively associated with the magnitude of the diaphragmatic shift (p = 0.012).