Total score = sum of points for age, respiratory hospitalisation, baseline FVC % predicted and 24-week change in FVC % predicted.

Predictor	Category	Points
Age	<60 years	0
Age	60–69 years	4
Age	≥70 years	8
Respiratory hospitalisation in past 6 months	No	0
Respiratory hospitalisation in past 6 months	Yes	14
Baseline FVC % predicted	≥80%	0
Baseline FVC % predicted	66–79%	8
Baseline FVC % predicted	51–65%	13
Baseline FVC % predicted	≤50%	18
24-week change in FVC % predicted	>−4.9 percentage points	0
24-week change in FVC % predicted	−5 to −9.9 percentage points	10
24-week change in FVC % predicted	≤−10 percentage points	21

du Bois Score for Idiopathic Pulmonary Fibrosis (IPF) Mortality