Table 1: Parameter estimates from lung cancer risk model^a in cumulative WLM..

Models

Parameters

A

B

C

E

0.219

0.07

0.114

0.078

0.845

0.907

0.781

Time since last exposure ^b

<10

1.00

1.00

1.00

10-19

0.53

0.52

0.48

20+

0.16

0.15

0.14

Attained age^c

<50

1.00

1.00

1.00

50-59

0.34

0.256

0.24

60-69

0.10

0.07

0.04

70

0.07

0.06

0.02

Change in deviance^d

-^e

4.2

51.2

14.8

^a Fitted risk model, RR = 1 + ß × w^k × tsle × age, where w is WLM and tsle is time since last exposure.

^b Data include 177,172, and 121 lung cancer cases in each category, respectively.

^c Data included 83, 173, 133, and 81 lung cancer cases in each category, respectively.

^d Change in deviance tests difference in model fit compared with model in column A. Value is asymptotically chi-squared with degrees of freedom equal to the number of omitted parameters.

^e Deviance of model was 2,509.9 on 17,218 degrees of freedom.