included to reach an adequate sample size. A similar

sampling approach for the cases diagnosed in 1979 was used

for the rectocolon cancers.

 The characteristics of the lung, breast, and rectocolon

cases are given in Table 2.



Table 2

Summary of Characteristics of the Sample

 Site


Characteristic Lunga Breastb Rectocolonc

Age

 M 66.33 65.44 71.70
 SD 10.01 14.37 10.80
 Mdn 67 69 72
Survival

 M 7.56 27.17 17.96
 SD 8.11 18.93 17.89

Race
 White 246 91 157
 Black 20 10 9

Sex
 Male 190 0 70
 Female 76 101 96


a N = 266. b N = 101. cN = 166.
 N 266. N =101. N = 166.