TABLE 4.

MULTIVARIABLE-ADJUSTED POPULATION ATTRIBUTABLE FRACTIONS STRATIFIED BY DIAGNOSIS

		PAF at 1 Year	PAF at 5 Years
	No.	(%)	(%)
All recipients	5,978	12	8
Cystic fibrosis	966	1	7
Chronic obstructive pulmonary disease	3,766	11	7
Diffuse parenchymal lung disease	1,246	20	12

Definition of abbreviation: PAF = population attributable fraction.

PAF was estimated using multivariable-adjusted hazard ratios from Cox models containing model 4 covariates and censored at 1 or 5 years. PAF is the proportion of deaths related to an exposure of interest and represents the greatest possible proportional reduction in the number of deaths if the exposure of interest were eliminated from the population. For example, if all lung transplant recipients were of normal weight, up to 12% of deaths might be prevented in the first year after transplantation.