Table 1.

Demographic information

	Numbers of subjects
Total	5,967
Gender
Male	3,757
Female	2,210
Site
Site 1 (UC Boulder 3T)	490
Site 2 (UNM 3T)	3,914
Site 3 (UNM 1.5T)	1,563
Age (y)
13–22	2,080
23–32	1,690
33–42	934
43–52	710
53–62	364
63–72	189