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Table 1 Baseline characteristics of the participants

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

Characteristic   Total sample Excluded p-value
N = 268 Mean/% Mean/% Missing  
229(85.5) 39 (14.5)   
Sex n(%) Male 154 (67.3) 22 (56.4) 0 0.1876
Age Mean (SD)   63.2 (12.9) 62.0 (13.6) 0 0.677
Education Basic 99 (47.1) 15 (50) 9 0.6694
n(%) Secondary 59 (28.1) 8 (26.7)   
Higher 52 (24.8) 7 (23.3)  
Employment Full-time 57 (24.9) 11 (29.7) 2 0.1379
n(%) Part-time 24 (10.5) 1 (2.7)   
Unemployed 30 (13.1) 9 (24.3)  
Retired 118 (51.5) 16 (43.2)  
Smoking status Current smoker 9 (3.9) 3 (8.1) 2 0.3797
n(%) Former smoker 139 (60.7) 19 (51.4)   
Never smoker 81 (35.4) 15 (40.5)  
ILD subtypes IPF 55 (24.0) 6 (15.4) 0 0.1145
n(%) Sarcoidosis 51 (22.3) 7 (18.0)   
Hypersensitivity pneumonitis 26 (11.4) 1 (2.6)  
Other IIPsa 21 (9.2) 5 (12.8)  
Others 76 (33.2) 20 (51.3)  
DLCO% predicted Mean (SD)   44.2 (17.2) 44.2 (17.2) 17 0.3187
FVC % predicted Mean (SD) 77.4 (18.9) 53.1 (17.5) 4 <.0001
Mean number of comorbidities Mean (SD) 2.7 (1.8) 2.8 (2.0) 0 0.8936
EQ-5D-5L
Mean (SD)
EBVS 0.66 (0.17) 0.6 (0.2) 6 0.0320
VAS 61.4 (19.1) 49.1 (17.9) 5 0.0005
K-BILD Total score 53.6 (11.7) 48.2 (10.7) 2 0.0166
Mean(SD) Breathlessness and activity 41.1 (20.6) 31.6 (23.3) 0 0.0052
Chest symptoms 64.4 (22.2) 57.4 (22.4) 1 0.0920
Psychological impact 52.2 (13.8) 47.1 (12.1) 2 0.1014
  1. Percentages in the excluded group show the percent of valid answers. Abbreviations: SD Standard deviation, EQ-5D EBVS-EQ-5D experience based value set, VAS-Visual Analog Scale, IPF-idiopathic pulmonary fibrosis, IIP-idiopathic interstitial pneumonia, EBVS-experience based value. ainlcuding non-specific interstitial pneumonia, desquamative interstitial pneumonia, cryptogenetic organizing pneumonia, lymphocytic interstitial pneumonia, respiratory bronchiolitis-associated interstitial lung disease, pleuropulmonary fibroelastosis, and acute interstitial pneumonia