Table 1.

Characteristics of 94 Families with Prostate Cancer, by Mean Age at Diagnosis

		Men Whose Mean Age at Diagnosis Was(years)
	Overall	<66 years	⩾66 years
No. of families	94	50	44
No. of affected men sampleda	340	185	155
Average no. of affected men sampled/family	3.6 (2–12)	3.7	3.5
Mean age at diagnosis of affected men sampled (range)	65.4 years (42– 85 years)	62.3 years	69.1 years

^aIncludes one affected man who was surveyed but who did not provide a blood sample.