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Table 2 The correlation between health status and lung function

From: Quality of life assessment in interstitial lung diseases:a comparison of the disease-specific K-BILD with the generic EQ-5D-5L

  EQ-5D EBVS VAS K-BILD Total K-BILD Breath K-BILD Chest K-BILD Psych FVC % predicted DLCO % predicted Comorbidity sum score
EQ-5D EBVS 1  
VAS 0.58
(<.0001)
1  
K-BILD Total 0.71
(<.0001)
0.55
(<.0001)
1  
K-BILD Breath 0.71
(<.0001)
0.58
(<.0001)
0.86
(<.0001)
1  
K-BILD Chest 0.60
(<.0001)
0.47
(<.0001)
0.78
(<.0001)
0.61
(<.0001)
1  
K-BILD Psych 0.60
(<.0001)
0.49
(<.0001)
0.93
(<.0001)
0.67
(<.0001)
0.69
(<.0001)
1  
FVC % predicted 0.30
(<.0001)
0.21
(0.0013)
0.29
(<.0001)
0.36
(<.0001)
0.22
(0.0006)
0.24
(0.0002)
1  
DLCO % predicted 0.17
(0.0106)
0.14
(0.0409)
0.27
(<.0001)
0.35
(<.0001)
0.12
(0.0821)
0.22
(0.001)
0.47
(<.0001)
1
Comorbidity sum score −0.26
(<.0001)
− 0.25
(0.0002)
− 0.21
(0.0012)
− 0.28
(<.0001)
−0.16
(0.0173)
− 0.16
(0.0174)
− 0.09
(0.1569)
− 0.26
(<.0001)
1
  1. Abbreviations; K-BILD Breath- K-BILD Breathlessness and activity, K-BILD Chest- K-BILD Chest symptoms, K-BILD Psych- K-BILD Psychological Impact, FVC % pred –Forced vital capacity % predicted, DLCO % predicted- Carbon monoxide diffusing capacity % predicted. In brackets we reported p-values. We considered correlations < 0.3 as weak, ≥0.3 and < 0.7 as moderate and ≥ 0.7 as strong