Table 1.

Participant Age and Sex^a

	Group A		Group B
Age, y	Male	Female	Male	Female
40-49	1 (0.04)	1 (0.04)	1 (0.05)	0
50-59	4 (0.16)	2 (0.08)	3 (0.14)	3 (0.14)
60-69	8 (0.33)	6 (0.25)	6 (0.29)	4 (0.19)
70-79	1 (0.04)	2 (0.08)	0	4 (0.19)
Total	14 (0.56)	11 (0.44)	10 (0.48)	11 (0.52)

^aValues are expressed as n (%). There were 25 participants in group A and 21 in group B.