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Table 2 Regression formulas for predicting VEpeak from resting lung function tests in the derivation cohort, sorted in descending order of value of r2. All regression formulas used the absolute value not percent of predicted

From: IPF patients are limited by mechanical and not pulmonary-vascular factors – results of a derivation-validation cohort study

Covariate

Gradient

Intercept

Adjusted r2

Only RER > 1.10

 FEV1

20.1

15.4

0.56

 FVC

15.9

16.92

0.55

 TLC

8.9

17.8

0.40

 MVV

0.35

22.1

0.39

 DLCO

0.9

42.1

0.10

Entire Cohort

 FEV1

19.1

14.7

0.48

 FVC

15.9

15.3

0.47

 MVV

0.42

16.3

0.45

 TLC

9.7

12.4

0.33

 DLCO

1.1

35.7

0.07

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BMC Pulmonary Medicine

ISSN: 1471-2466

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