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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Med Sci Sports Exerc. 2011 Feb;43(2):218–224. doi: 10.1249/MSS.0b013e3181eb6024

Table 4.

Hierarchical regression predicting change in functional performance (slope of total FPI) (N=87)

Independent variables, Slope of measures Cum R2 Adj B±SE P Value
Disease Severity .06
 FEV1/FVC .013 ± .007 .051
 DLco, % pred .000 ± .004 .938
 RV/TLC .330 ± .488 .501
Body composition .10
 Body Fat, % −.024 ± .012 .061
Symptoms .12
 CRQ-M dyspnea .002 ± .038 .962
 CRQ fatigue .031 ± .054 .565
Functional Capacity .31
 6MWD, % pred .009 ± .003 .003
 Muscle strength, % pred .012 ± .004 .005
 PI max, % pred .004 ± .002 .072

Forced expiratory volume in one second/forced vital capacity (FEV1/FVC), diffusion capacity (DLco), residual volume/total lung capacity (RV/TLC), Chronic Respiratory Disease Questionnaire-modified (CRQ-M), CRQ Chronic Respiratory Disease Questionnaire (CRQ), six-minute distance walk distance (6MWD), maximal inspiratory pressure (PI max).