Résumé
[ Objective] To investigate the under-reporting rate of death and its causes registration , and to accurately estimate the death rates of the population and infants in Fenghua City . [ Methods] According to the “Survey Program of National Disease Surveillance System on Death Under-reporting”, a retrospective investigation was done of death under-reporting in the sample villages in 2009-2011 on the principle of capture-mark-recapture .The data from investigation have been checked up and compared with that on death causes registration surveillance obtained through “Death Under-reporting System” and“China Information System for Diseases Control and Prevention” so as to determine the under-reporting rate . [ Re-sults] A total of 855 death cases were determined by the under-reporting investigation on all sample villa-ges, and the total of 853 death cases were reported by the death causes registration system .Two cases were omitted , with under-reporting rate being 0 .23%.The omission mortality in survey was 7 .10‰.The pro-portion of the deceased highest diagnostic units and medical institutions above county level was 96.61%. The proportion of not seeking treatment was 0 .58%.The inaccurate coding rate was 3 .51%. [ Conclu-sion] In 2009-2011 in Fenghua City,death under-reporting rate was low, integrity good and death diag-nosis reliable in terms of death monitoring work stipulated by national disease monitoring system .