Table 4.

Cancer risk in diethylstilbestrol (DES) exposed compared with unexposed men

	DES Status
	Exposed Cases PYc = 47,322	Unexposed Cases PYc = 45,256	HRa (95% CIb)
All Sites	187	206	0.94 (0.77, 1.15)
Digestive System (colon, rectum)	37	32	1.16 (0.72, 1.88)
Colon and rectum	18	17	1.18 (0.60, 2.31)
Liver	6	3	1.73 (0.43, 7.00)
Lung and bronchus	19	21	1.02 (0.55, 1.92)
Prostate	65	72	0.95 (0.68, 1.33)
Testis	6	3	1.74 (0.43, 7.07)
Urinary system (bladder, kidney)	11	23	0.48 (0.23, 1.00)
Bladder	4	13	0.29 (0.09, 0.90)
Kidney and renal pelvis	7	10	0.74 (0.28, 1.96)
Thyroid	7	7	1.09 (0.38, 3.17)
Lymphoma	8	11	0.91 (0.35, 2.37)
Leukemia	10	10	0.94 (0.39, 2.29)

^aHR Hazard ratio, with age as the underlying time variable, adjusted for birth year and cohort.

^bCI Confidence interval

^cPY Person-years