When a participant’s death is reported, information about cause(s) of death and antecedent health conditions is sought through the participant’s next-of-kin or designated contact persons. In addition, a copy of the death certificate and permission for medical record or pathology report retrieval, as appropriate, are requested from a participant’s next-of-kin. In addition, the National Death Index (NDI Plus) is periodically queried to confirm reports of death and obtain primary cause of death and other conditions present at death. Linkage to NDI Plus is also carried out to update vital status for participants who are lost to follow-up.
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