Appendix Table 1.

Revised LLP Risk Model Regression Coefficients and Internal Discriminative Validation^*

Variable	Missing Risk Factor
	Smoking Duration	History of Pneumonia	History of Cancer	Family History of Lung Cancer	Asbestos Exposure
Model risk factors
Smoking duration
1–19 y	–	0.7908	0.7526	0.8159	0.7950
20–39 y	–	1.4906	1.4562	1.4743	1.4704
40–59 y	–	2.5216	2.5274	2.5708	2.5359
≥60 y	–	2.6762	2.7624	2.7924	2.7424
History of pneumonia	0.5619	–	0.5893	0.5814	0.5917
History of cancer	0.8599	0.6620	–	0.6808	0.6795
Family history of lung cancer
Early onset (age <60 y)	0.9351	0.6538	0.7096	–	0.6901
Late onset (age ≥60 y)	0.2779	0.1850	0.1943	–	0.2009
Asbestos exposure	0.6659	0.6273	0.6367	0.6323	–
Internal validation
AUC	0.6374	0.7554	0.7543	0.7537	0.7526

AUC — area under the receiver-operating characteristic curve; LLP = Liverpool Lung Project.

^*Estimated from the LLP case–control study.