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[Morbidity and mortality in low birth weight infants]
M A Rivera-Rueda1, J S González-Treviño, R Minguet-Romero
1División de Pediatría, Instituto Nacional de Perinatología, México, D.F.
Boletin Medico Del Hospital Infantil De Mexico
|February 1, 1991
Summary
This study on low birth weight infants found high mortality in extremely low birth weight neonates. Small for gestational age infants experienced less morbidity and shorter hospital stays, regardless of birth weight.
Area of Science:
- Neonatalogy
- Pediatric Medicine
- Perinatal Research
Background:
- Low birth weight (LBW) infants (<2,500 g) face significant health challenges.
- Congenital malformations were excluded to focus on LBW-specific outcomes.
- Understanding morbidity and mortality in LBW neonates is crucial for clinical care.
Purpose of the Study:
- To analyze morbidity and mortality patterns in 415 newborn infants with birth weights under 2,500 g.
- To compare outcomes between infants categorized by birth weight (1,500-2,499 g, 1,000-1,499 g, <1,000 g) and gestational age (small for gestational age [SGA] vs. appropriate for gestational age [AGA]).
Main Methods:
- Retrospective analysis of 415 LBW infants, excluding those with major congenital malformations.
- Infants classified into three birth weight groups and two gestational age groups (SGA and AGA).
- Comparison of intrahospitalary morbidity, mortality rates, and length of hospitalization across groups.
Main Results:
- Extremely low birth weight neonates (<1,000 g) exhibited a very high mortality rate.
- The population comprised 67% AGA and 33% SGA infants.
- SGA infants demonstrated lower intrahospitalary morbidity and shorter hospitalization durations compared to AGA infants, irrespective of birth weight.
Conclusions:
- Birth weight is a critical determinant of mortality in LBW infants, particularly in the extremely low birth weight category.
- SGA status is associated with better intrahospitalary outcomes (less morbidity, shorter stays) than AGA status, independent of birth weight.
- No significant difference in perinatal asphyxia was observed in relation to birth weight, potentially due to better initial condition of SGA infants.