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Table 3 Comparison of VA Mortality Data with NDI Data by Source (N = 2,998)*

From: Accuracy and completeness of mortality data in the Department of Veterans Affairs

Data Source Deceased in Source Deceased in NDI Sensitivity Specificity PPV NPV
   Yes No   (95% Confidence Interval)  
BIRLS-DF Yes 226 3 77.4 99.9 98.7 97.6
  No 66 2,703 (72.2 – 82.1) (99.7 – 100.0) (96.2 – 99.7) (97.0 – 98.2)
MSID Yes 35 0 12.0 100.0 100.0 91.3
  No 257 2,706 (8.49 – 16.3) (99.9 – 100.0) (90.0 – 100.0) (90.3 – 92.3)
MVS Yes 243 3 83.2 99.9 98.8 98.2
  No 49 2,703 (78.4 – 87.3) (99.7 – 100.0) (96.5 – 99.7) (97.7 – 98.7)
SSA-DMF Yes 269 3 92.1 99.9 98.9 99.2
  No 23 2,703 (88.4 – 94.9) (99.7 – 100.0) (96.8 – 99.8) (98.7 – 99.5)
Combined data Yes 287 5 98.3 99.8 98.3 99.8
  No 5 2,701 (96.0 – 99.4) (99.6 – 99.9) (96.0 – 99.4) (99.6 – 99.9)
  1. * NDI indicates the National Death Index; BIRLS-DF, the Beneficiary Identification and Resource Locator Subsystem Death File; MSID, the VHA Medical SAS Inpatient Datasets; MVS, Medicare Vital Status; SSA-DMF, the Social Security Administration Death Master File; PPV, positive predictive value; NPV, negative predictive value.