Table 1.

Demographic and Military Characteristics of Study Subjects

Characteristic	Percent of Cases (n = 180)	Percent of Controls (n = 532)
Gender
Male	83.3	83.8
Age at diagnosis categories (y)
18–20	15.6	16.4
21–25	41.7	41.2
26–30	20.6	20.3
31–35	12.2	12.8
>35	10.0	9.4
Race
White	48.9	49.1
Black	44.4	44.5
Other	6.7	6.4
Hispanic
Yes	11.7	6.0
Branch of Military
Army	56.1	56.0
Air force	11.1	11.3
Marines	4.4	4.5
Navy	28.3	28.2
Time in service before discharge (y)
≤1	41.1	39.7
>1 to ≤ 3	24.4	24.6
>3 to ≤ 5	16.7	16.7
>5 to ≤ 10	18.3	9.4
>10	9.4	9.6