Table 2.

Associations of Sociodemographic and Army Career Variables With Post-Enlistment Onset of Suicidal Behavior in the April to December 2011 Army STARRS AAS^a

Variable	Odds Ratio (95% CI)
	Ideation (n = 4897)	Plans (n = 5239)	Attempts (n = 5324)
Age, y
17–19	1 [Reference]	1 [Reference]	1 [Reference]
20–24	0.8 (0.4–1.7)	0.6 (0.3–1.2)	1.1 (0.3–3.4)
≥25	0.7 (0.3–2.0)	0.5 (0.1–1.7)	0.3 (0.1–2.0)
${\mathrm{\chi }}_2^2$ Value	0.4	1.8	3.9
Sex
Men	1 [Reference]	1 [Reference]	1 [Reference]
Women	2.1 (1.4–3.1)b	2.7 (1.5–5.1)b	3.3 (1.5–7.5)b
${\mathrm{\chi }}_1^2$ Value	13.8b	10.0b	8.6b
Race/ethnicity
Non-Hispanic white	1 [Reference]	1 [Reference]	1 [Reference]
Non-Hispanic black	0.4 (0.2–0.7)b	0.7 (0.3–1.3)	0.5 (0.2–1.3)
Hispanic	1.0 (0.7–1.4)	0.8 (0.4–1.8)	1.2 (0.4–3.8)
Other	0.4 (0.1–1.3)	0.6 (0.1–3.0)	1.4 (0.3–6.1)
${\mathrm{\chi }}_3^2$ Value	11.1b	1.8	2.4
Marital status
Married	1 [Reference]	1 [Reference]	1 [Reference]
Previously married	0.2 (0.0–1.7)	0.5 (0.1–3.4)	0.1 (0.0–0.4)b
Never married	1.0 (0.8–1.2)	0.8 (0.4–1.5)	0.8 (0.3–1.7)
${\mathrm{\chi }}_2^2$ Value	2.1	1.0	7.4b
Age at enlistment, y
17–18	1.3 (0.7–2.5)	1.4 (0.4–4.4)	0.5 (0.1–2.5)
19–20	1.1 (0.6–2.1)	2.0 (0.8–5.4)	0.8 (0.2–3.5)
21–23	0.7 (0.4–1.1)	0.9 (0.3–2.6)	0.4 (0.1–1.8)
≥24	1 [Reference]	1 [Reference]	1 [Reference]
${\mathrm{\chi }}_3^2$ Value	9.4b	4.2	2.8
Rank of enlisted soldier
Lower rank (grades E1–E4)	2.5 (1.3–5.0)b	4.5 (1.4–14.0)b	5.8 (1.8–18.1)b
Higher rank (grades E5–E9)	1.2 (0.8–1.7)	1.8 (0.7–4.5)	2.5 (0.9–7.3)
Officer (grades W1–W5 or O1–O9)	1 [Reference]	1 [Reference]	1 [Reference]
${\mathrm{\chi }}_2^2$ Value	7.4b	10.7b	16.4b
${\mathrm{\chi }}_1^2$ Valuec	5.5b	10.0b	13.4b
Deployments, No.
0	1 [Reference]	1 [Reference]	1 [Reference]
1	1.6 (1.0–2.7)	1.7 (0.7–4.0)	1.3 (0.5–3.2)
2	1.9 (0.8–4.8)	2.2 (0.7–6.9)	2.4 (1.2–5.1)b
≥3	1.8 (0.8–3.7)	2.7 (1.0–7.7)	3.7 (0.9–16.1)
${\mathrm{\chi }}_3^2$ Value	4.1	3.9	7.5
Command
FORSCOM	1 [Reference]	1 [Reference]	1 [Reference]
Area Service Component Commandsd	1.3 (0.8–2.1)	1.9 (0.6–5.4)	0.8 (0.3–1.8)
USASOC	0.7 (0.2–2.1)	0.3 (0.0–1.8)	0.0 (0.0–0.0)b
MEDCOM	0.8 (0.3–2.1)	1.2 (0.2–7.0)	0.7 (0.1–3.9)
TRADOC	0.7 (0.3–1.6)	1.4 (0.8–2.6)	0.5 (0.1–2.7)
All other regular Army Commandse	0.8 (0.5–1.4)	1.4 (0.6–3.3)	0.6 (0.2–2.1)
${\mathrm{\chi }}_6^2$ Value	3.6	7.3	2040.8b

Abbreviations: AAS, All-Army Survey; Army STARRS, Army Study to Assess Risk and Resilience in Servicemembers; FORSCOM, US Army Forces Command; MEDCOM, US Army Medical Command; TRADOC, US Army Training and Doctrine Command; USASOC, US Army Special Operations Command.

^aBased on a series of discrete-time survival models with a logistic link function to predict first lifetime onset of suicidal ideation, suicide plan, and suicide attempt in the years subsequent to enlistment, with all the predictors in the same model. Sample sizes are successively larger in predicting the 3 component outcomes owing to some respondents having first onsets of either (1) ideation but not plans or (2) plans but not attempts prior to their age at enlistment.

^bSignificant at the .05 level, determined by use of a 2-sided test.

^cTests for the significance of the difference between lower-ranking and higher-ranking enlisted soldiers.

^dThe complete set of Area Commands includes US Army Africa, Central, North, South, Europe, and Pacific.

^eIncluding US Army Materiel Command, all other Army Service Component Commands, and all other Direct Reporting Units. See http://www.army.mil/info/organization/ for a complete description of the US Army Command Structure.