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

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

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