GAP Index for Idiopathic Pulmonary Fibrosis (IPF) Mortality
Gender, age, predicted FVC %, and predicted DLCO % → total points and stage I–III.
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How it works
The GAP index combines gender (male +1), age, FVC % predicted, and DLCO % predicted into a 0–8 point score with stages I–III and associated mortality estimates per.
Limits
Applies to IPF populations in derivation studies; does not replace multidisciplinary ILD assessment or transplant referral pathways.
Educational tool only—not for diagnosis or treatment decisions.