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Table 4 Demographic and Military Characteristics of Millennium Cohort Study Decedents by Mortality Data Source, July 1, 2001-December 31, 2004

From: Early mortality experience in a large military cohort and a comparison of mortality data sources

Baseline Characteristic All Sources
(n= 202)
%b
Department of Defense Medical Mortality Registry
(n= 94)
%b
National Center for Health Statistics National Death Index
(n= 164)
%b
Social Security Administration Death Master File
(n= 173)
%b
Department of Veterans Affairs Mortality Data Files
(n= 196)
%b
Gender      
   Male 79.7 80.9 76.2 79.8 80.1
   Female 20.3 19.2 23.8 20.2 19.9
Birth year      
   Pre-1960 43.1 22.3 48.8 48.6 43.9
   1960-1969 28.7 36.2 29.9 29.5 28.6
   1970-1979 21.8 31.9 15.2 17.3 20.9
   1980 or later 6.4 9.6 6.1 4.6 6.6
Race/ethnicity      
   White non-Hispanic 74.8 69.2 74.4 75.7 75.5
   Black non-Hispanic 10.4 10.6 11.0 9.3 9.7
   Other 14.9 20.2 14.6 15.0 14.8
Marital status      
   Not married 22.8 29.8 18.9 19.7 23.5
   Married 68.8 67.0 72.0 71.1 67.9
   Divorced 8.4 3.2 9.2 9.3 8.7
Education      
   High school or less 50.5 48.9 50.0 48.6 51.0
   Some college 24.8 22.3 26.8 25.4 24.0
   Bachelor's degree 15.8 17.0 13.4 16.8 16.3
   Advanced degree 8.9 11.7 9.8 9.3 8.7
Service component      
   Reserve/National Guard 55.5 31.9 61.0 56.7 56.6
   Active duty 44.6 68.1 39.0 43.4 43.4
Branch of service      
   Army 48.5 46.8 47.6 47.4 48.5
   Air Force 30.7 24.5 31.7 33.0 30.6
   Navy/Coast Guard 15.8 20.2 18.3 15.6 15.8
   Marine Corps 5.0 8.5 2.4 4.1 5.1
Military pay grade      
   Enlisted 75.7 73.4 76.8 75.1 76.0
   Officer 24.3 26.6 23.2 24.9 24.0
Occupational category      
   Combat specialists 22.3 26.6 18.3 21.4 22.5
   Health care specialists 9.4 8.5 11.0 11.0 9.7
   Service supply and functional support 32.2 27.7 37.8 32.4 32.1
   Other 36.1 37.2 32.9 35.3 35.7
Deployment experiencec      
   Pre-2001 23.3 21.3 26.2 24.9 24.0
   2001-2006 15.4 25.5 7.3 13.9 15.3
   Pre-2001 and 2001-2006 9.4 16.0 5.5 9.8 9.2
   None 52.0 37.2 61.0 51.5 51.5
Separated from military serviced      
   No 85.6 89.4 82.9 85.6 86.2
   Yes 14.4 10.6 17.1 14.5 13.8
  1. a Includes Millennium Cohort participants who enrolled in the study between July 1, 2001, and June 30, 2003, and had complete demographic data.
  2. b Percents may not sum to 100 due to rounding.
  3. c Deployment category "Pre-2001" refers to individuals deployed to the 1991 Gulf War or to Bosnia, Kosovo, or Southwest Asia between January 1, 1998, and September 30, 2000; the category "2001-2006" includes individuals deployed in support of the military operations in Iraq and Afghanistan between September 1, 2001, and December 31, 2006.
  4. d Separation (retirement or early separation) from military service as of December 31, 2006 (excludes death as a reason for separation).