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Updated: Oct 3, 2026

Biochemical Measurement of Neonatal Hypoxia
Published on: August 24, 2011
Incomplete birth certificates: a risk marker for infant mortality
Jeffrey B Gould1, Gilberto Chavez, Amy R Marks
1School of Public Health, University of California, 309 Earl Warren Hall, Berkeley, CA 94720-7630, USA. jgould@uclink4.berkeley.edu
Objectives:
This study assessed the relationship between incomplete birth certificates and infant mortality.
Methods:
Birth certificates from California (n = 538 945) were assessed in regard to underreporting of 13 predictors of perinatal outcomes and mortality.
Results:
Of the birth certificates studied, 7.25% were incomplete. Underreporting was most common in the case of women at high risk for poor perinatal outcomes and infants dying within the first day. Increasing numbers of unreported items were shown to be associated with corresponding increases in neonatal and postneonatal mortality rates.
Conclusions:
Incomplete birth certificates provide an important marker for identifying high-risk women and vulnerable infants. Because data "cleaning" will result in the removal of mothers and infants at highest risk, birth certificate analyses should include incomplete records.
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