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Table 2 Definition of pulmonary fibrosis score

From: Predicting factors of symptomatic radiation pneumonitis induced by durvalumab following concurrent chemoradiotherapy in locally advanced non-small cell lung cancer

Score Definition
0 No fibrosis
1 Interlobular septal thickening; no descrete honeycoming
2 Honeycoming (with or without septal thickening) involving < 25% of the lobe
3 Honeycoming involving 25–49% of the lobe
4 Honeycoming involving 50–75% of the lobe
5 Honeycoming involving > 75 of the lobe