The Five Series Study Mortality of Military Participants in U.S. Nuclear Weapons Tests (2000) / Chapter Skim
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8 Mortality Ascertainment
8 Mortality Ascertainment
Pages 42-49
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From page 42... ...
is the sole source of fact-of-death ascertainment for this report's dataset. If a person's record was not found in the BIRLS database, the VA Master Index was searched for additional descriptive information (e.g., military service number or a middle name)
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the record existed, but MFUA submitted insufficient information, such as a misspelled name, to identify it; (2) the requesting information was correct, but the BIRLS record includes a misspelling; (3)
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Ct Ct cn Cat V)
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Because using NTPR Social Security numbers would increase the likelihood of finding only participants in NDI, the study design excluded use of NTPR Social Security numbers because they would have allowed nonequivalent mortality ascertainment procedures for the two cohorts, introducing a bias into the ascertainment of the outcome data. However, the availability of NTPR Social Security numbers for participants did allow us to estimate how many deaths might have been ascertained if we had more complete SSN coverage.
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Although the methods employed across these studies are varied, all except the Boyle and Decoufle study showed the completeness of veteran death reporting in BIRLS to be 90 95 percent. Although the veterans studied here are, for the most part, neither World War II nor Vietnam era vets, we believe that the completeness of death reporting in BIRLS is roughly the same among the veterans in the present study.
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o Ct lo 4 Ct Calo ~o ~ ...
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CAUSE-OF-DEATH ACQUISITION The two sources of cause-of-death information are both death certificate based: the death certificate itself and electronic tapes compiled from the death certificates. The BIRLS database provides the location of the claims folder: a specific VA regional office (VARO)
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We looked at the records that had a malignant neoplasm in any of the cause fields from either source to determine whether cancers the prime endpoint of this study-were noted similarly by the two coding sources. There were 74 records with malignancy codes; of these, 6 were discrepant in the underlying causeof-death field.
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