A systematic review of post-deployment injury-related mortality among military personnel deployed to conflict zones

Table 7 Meta-analysis: Summary mortality rate ratios comparing conflict-zone service members to non-conflict-zone service members

Conflict	Follow-Up Period (Studies)	Mortality Grouping	Summary Mortality Rate Ratio Conflict-Zone Service Members/ Non-Conflict-Zone Service Members (95% Confidence Interval)	Methodological Quality Score (mean ± SD)
Vietnam	Shorter Follow-up, 9 to 18 Years [9, 42]	All External Causes	1.26 (1.08–1.46)	94 ± 3
		Motor Vehicle Events	1.27 (1.03–1.57)
		Suicide	1.26 (0.91–1.77)
		Homicide	1.02 (0.89–1.17)
	Longer Follow-up, 18 to 40 Years [25, 29, 51]	All External Causes	1.19 (1.11–1.28)	86 ± 6
		Motor Vehicle Events	1.21 (0.99–1.47)
		Suicide	1.06 (0.83–1.36)
		Homicide	0.90 (0.60–1.36)^a
Gulf	Shorter Follow-up, 3 to 8 Years [28, 32]^b	All External Causes	1.26 (1.16–1.37)	86 ± 4
		Motor Vehicle Events	1.39 (1.22–1.60)
		Suicide	0.95 (0.80–1.14)
		Homicide	0.95 (0.73–1.23)
	Longer Follow-up, 7 to 13 Years [57, 59]^b	All External Causes	1.09 (1.04–1.14)	85 ± 3
		Motor Vehicle Events	1.29 (1.18–1.40)
		Suicide	0.99 (0.85–1.15)
		Homicide	1.02 (0.89–1.17)^c

^a Data available from only one study [29]
^b For the two Kang and Bullman studies [28, 57], men and women were entered as separate cohorts in the meta-analysis
^c Data available from only one study [57]

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