Fig. 1From: The European MultiPartner IPF registry (EMPIRE): validating long-term prognostic factors in idiopathic pulmonary fibrosisSmooth cubic spline curve of the adjusted hazard ratio (solid line) and 95% CIs (dotted lines) of death, estimated by Cox proportional hazards model, as a function of: a) age at IPF diagnosis; b) % predicted FVC; and c) % predicted TLCOBack to article page