analysis with logistic regression controlling for age , race , occupational exposures to lung carcinogens , average number of cytology records per year , and smoking habits revealed that the estimate of the relative rate ( rr ) of developing bronchogenic carcinoma was greater among men who had mild atypia as compared with men who had negative cytology readings , but there were marked differences among institutions ( rr = 1.1 , 95 % confidence interval ( cl ) 0.8-1.5 at the johns hopkins university ; rr = 1.6 , 95 % cl 1.1-2.5 at the memorial sloan-kettering cancer center ; and rr = 2.5 , 95 % cl 1.6-4.0 at the mayo clinic ) .
C0024109
lung
C0007121
bronchogenic