a Fitted risk model, RR = 1 + ß × wk ×
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
c Data included 83, 173, 133, and 81 lung cancer cases in each
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.