a Fitted risk model, RR = 1 + ß× dk ×
Ýyfe × tsle × age × (age-60), where d is
duration of exposure, yfe is calendar year of first exposure, and tsle is time
since last exposure.
b Data include 310, 141, and 19 lung cancer cases in each
c 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.
d Deviance of model was 2,557.7 on 17,215 degrees of freedom.