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Mortality of Veteran Participants in the CROSSROADS Nuclear Test (1996) / Chapter Skim
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The Comparison Cohort
Pages 31-34

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From page 31...
... The comparison of participant death rates with rates for comparable controls should eliminate the risk of bias introduced by the "healthy soldier effect."'4 CO1\'IPARISON COHORT SELECTION Navy and Shipboard Marines The Defense Nuclear Agency (DNA) provided lists of potential control units '5 to the Medical Follow-up Agency (MFUA)
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From page 32...
... Second, because selected control ships did not always supply sufficient numbers of personnel for the comparison cohort to match the desired rating distribution, additional control ships were selected to provide supplements. The additional ships maintain the type of ship choice initially derived from the to-be-matched participant ship.
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From page 33...
... Because all selected controls were to have their military personnel records abstracted, the NPRC registry was used to obtain unburned records for controls. The 80 percent loss of records meant that there was a need to oversample from Army and Army Air Corps unit records by roughly a factor of five to obtain sufficient potential controls to ensure finding a control with an unburned record.
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From page 34...
... A total of 40,354 military personnel records were abstracted. ADDITIONAL CONTROLS In 1989, DNA notified MFUA that the DNA list of CROSSROADS participants reflected substantial numbers of individuals who should not be on the list and omitted many who should be on the list.'fiThe final participant roster used in this study is about 2,500 individuals larger than the 1986 list on which control selection was based.
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Key Terms

  • army air
  • air corps
  • military personnel
  • muster rolls
  • control ship

  • participant ship
  • control ships
  • muster roll
  • military service
  • selected control

  • comparison cohort
  • unburned records
  • burned records
  • navy controls
  • control unit

  • mortality analysis
  • available record
  • marine corps
  • records center
  • balanced comparison

  • corps units
  • selected actual
  • original software
  • crossroads era
  • potential control

  • additional military
  • alphabetical order
  • independent source
  • potential controls
  • officers relied


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