ILD-GAP Combined with the Charlson Comorbidity Index Score (ILD-GAPC) as a Prognostic Prediction Model in Patients with Interstitial Lung Disease

Table 1

ILD-GAP and ILD-GAPC models.

		ILD-GAP model	ILD-GAPC model
		Point	Point
ILD diagnosis	IPF/UC-ILD	0	0
	CVD-IP ± iNSIP ± CHP	−2	−2
Sex	Female	0	0
	Male	1	1
Age	≤60	0	0
	61–65	1	1
	>65	2	2
%FVC	>75	0	0
	50–75	1	1
	<50	2	2
%DLco	>55	0	0
	36–55	1	1
	≥35	2	2
	Cannot perform	3	3
CCIS	0–1		0
	2–3		1
	≤4		2

CCIS, Charlson comorbidity Index Score; CHP, chronic hypersensitivity pneumonitis; CVD-IP, collagen vascular disease-related interstitial pneumonia; GAP, gender/age/physiology; GAPC, gender/age/physiology/Charlson comorbidity index score; ILD, interstitial lung disease; iNSIP, idiopathic nonspecific interstitial pneumonia; IPF, idiopathic pulmonary fibrosis; %DLco, percentage predicted diffusion capacity of lung for carbon monoxide; %FVC, percentage predicted forced vital capacity; UC-ILD, unclassifiable interstitial lung disease.