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Table 1 Comparison of characteristics of study participants from the MPI/PO Study by Identification Status on the SSA DMF.

From: Use of the Social Security Administration Death Master File for ascertainment of mortality status

  Identified as Dead (n = 330) Mean (SD) Not identified as Dead (n = 44) Mean (SD) P-VALUE
Age (in years) 77.5 (9.9) 70.7 (12.4) <0.01
Year of birth (in years) 1920.2 (10.0) 1927.5 (12.5) * 0.06
Year of death (in years) 1997.6 (1.8) 1998.0 (2.3)* 0.13
  % %  
Male 63.1 63.6 1.00
Foreign Born 35.8 59.1 0.01
African Americans 6.7 13.6 0.12
Asian 2.4 2.3 1.00
Hispanic 3.9 4.5 0.69
  1. Abbreviations: Myocardial Perfusion Imaging/Patient Outcomes, MPI/PO; Social Security Administration Death Master File, SSA DMF * This comparison is age adjusted