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Salud Pública de México

Print version ISSN 0036-3634


OSORNO-COVARRUBIAS, Lorenzo; VELA-URTECHO, Gabriela  and  DAVILA-VELAZQUEZ, Jorge. The graphical display of neonatal mortality risk at a regional perinatal center in Merida, Yucatan, Mexico: The joint effect of birth weight and gestational age. Salud pública Méx [online]. 2002, vol.44, n.4, pp.345-348. ISSN 0036-3634.

Objective. To determine the neonatal mortality risk according to gestational age and birth weight. Material and Methods. The cohort consisted of 19 668 newborns of Centro Médico Nacional (National Medical Center) Ignacio García Téllez, a tertiary level healthcare institution of the Instituto Mexicano del Seguro Social (Mexican Institute of Social Security, IMSS) of the Yucatan Peninsula. All new-borns discharged from the hospital between January 1 st , 1995 and October 31 st , 1999 were included in the study. Birth weight, gestational age, and conditions upon discharge were recorded. Absolute risk (AR) of mortality was calculated for each week-of-gestation- and birth group. Results. Observed AR in newborns 34 to 44 weeks of gestational age and weighing at least 2 250 g was 0.4, while that for those 26 to 32 weeks of gestational age and weighing between 1000 g was 15%. Conclusions. AR of neonatal mortality increased inversely proportional to gestational age and birth weight. These data can be used as reference values for our hospital and for comparison with other hospitals.

Keywords : infant-newborn; neonatal mortality risk; gestational-age; birth weight; Mexico.

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