Table 2

Demographic and military characteristics of active duty US Army suicides, 2007–8 combined^*

Characteristic	No of suicides (n=255)	% of suicides	Person-years^† (n=1 041 096)	Suicide rate per 100 000 person-years	RR	(95% CI)
Gender
Female	14	5.5	142 111	9.9	1.0	(Referent)
Male	241	94.5	898 985	26.8	2.7	(1.6 to 4.7)
Age group, years
18–24	114	44.7	404 933	28.2	1.0	(Referent)
25–34	73	28.6	393 400	18.6	0.7	(0.5 to 0.9)
35+	68	26.7	239437	28.4	1.0	(0.7 to 1.4)
Race/ethnicity
Caucasian	186	72.9	713 931	26.1	1.0	(Referent)
African American	30	11.8	212 377	14.1	0.5	(0.4 to 0.8)
Other	39	15.3	114 786	34.0	1.3	(0.9 to 1.8)
Marital status
Single	100	39.2	401 454	24.9	1.0	(Referent)
Married	151	59.2	582 636	25.9	1.0	(0.8 to 1.4)
Other^‡	4	1.6	55 874	–	–	–
Rank
Lower enlisted	137	53.7	470 714	29.1	1.8	(1.2 to 2.7)
Senior enlisted	90	35.3	399 380	22.5	1.4	(0.9 to 2.1)
Officer	28	11.0	171 001	16.4	1.0	(Referent)
Deployment
Never deployed	80	31.4	387 710	20.6	1.0	(Referent)
Ever deployed	175	68.6	654 099	27.4	1.3	(1.0 to 1.7)

↵* Data sources: Defense Casualty Information Processing System, Defense Medical Surveillance System.
↵† For person-years, totals within categories may be less due to incomplete data.
↵‡ Rates and relative risk for ‘other’ marital status were not calculated due to cell size smaller than five.