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Introducción: Comparado con el recién nacido a término, la tasa de morbimortalidad en el prematuro tardío es mayor a causa de las características específicas limítrofes que presentan en sus diferentes órganos. Objetivos: Describir las causas, las características clínicas y determinar la incidencia y la tasa de mortalidad de prematuros tardíos en comparación con los recién nacidos de término en un Departamento de Neonatología. Materiales y Métodos: Estudio observacional analítico retrospectivo, muestreo no probabilístico de casos consecutivos de recién nacidos prematuros tardíos, así como el siguiente recién nacido de término, de las fichas clínicas para una relación 1/1. Resultados: Durante el año 2012 nacieron 2741 RN vivos, 210 fueron RN prematuros tardíos (7,6%). El 61% de los nacimientos fue por parto normal en RN de término, y por cesárea 60% en RN pretérmino tardío (p=0,003). Presentaron alguna complicación posterior al nacimiento 95/210 de los RN pretérmino tardíos (45%), y 11/210 de los RN de término (5%) con un OR de 14,9 (IC= 7-29, P < 0.0001). La complicación más frecuente fue la dificultad respiratoria en 54/210 RN pretérmino tardíos y así como en 8/210 RNT, requerimiento de luminoterapia en 41/210 RN pretérmino tardíos y en 8/210 RNT. Se encontraron diferencias significativas en la presencia de dificultad respiratoria OR 8,74, requerimiento de luminoterapia OR 6, de antibioticoterapia OR 6 y de ingreso a terapia intensiva 9,6. No se detectó diferencias significativas en cuanto al óbito de los pacientes (p=0.29). Conclusiones: Los RN pretérminos tardíos presentan mayor morbilidad que los nacidos a término. La incidencia de RN pretérmino tardíos fue similar a lo encontrado a nivel mundial. La causa más frecuentemente asociada fue el elevado número de cesáreas. En comparación con los de término, presentaron mayor número de complicaciones como dificultad respiratoria y requerimiento de luminoterapia, y mayor tiempo de hospitalización.
Introduction: Compared with term newborns, the morbidity and mortality rate in late prematurity is higher because of the specific borderline development of the different organ systems. Objectives: To describe the causes, clinical characteristics and determine the incidence and mortality rate of late preterm infants compared with term infants in a Neonatology Department. Materials and Methods: This was a retrospective analytical observational study, with non-probabilistic sampling of consecutive cases of late preterm infants, as well as the following term newborn, as obtained from clinical records for a 1/1 ratio. Results: During 2012, 2741 live births were born, 210 were premature newborns (7.6%). 61% of births were due to normal delivery in term newborns, and 60% in late preterm newborns (p = 0.003). There were 95/210 complications of late preterm infants (45%) and 11/210 of term infants (5%) with an OR of 14.9 (CI = 7-29, P <0.0001) . The most frequent complication was respiratory distress in 54/210 late preterm infants, as well as in 8/210 in term newborns; luminotherapy in 41/210 late preterm infants and 8/210 in term newborns. Significant differences were found in the presence of respiratory distress, OR 8.74, luminotherapy, OR 6, antibiotic therapy, OR 6, and admission to intensive care unit, OR 9,6. There were no significant differences in patient deaths (p = 0.29). Conclusions: Late preterm infants present higher morbidity than those born at term. The incidence of late preterm newborns was similar to that found worldwide. The most frequent associated cause was a high number of cesarean sections. Compared with term newborns, late preterm newborns developed a greater number of complications such as respiratory distress and light therapy requirements, and longer hospitalization time.
RESUMO
OBJECTIVE: To develop and validate a model for very low birth weight (VLBW) neonatal mortality prediction, based on commonly available data at birth, in 16 neonatal intensive care units (NICUs) from five South American countries. STUDY DESIGN: Prospectively collected biodemographic data from the Neonatal del Cono Sur (NEOCOSUR) Network between October 2000 and May 2003 in infants with birth weight 500 to 1500 g were employed. A testing sample and crossvalidation techniques were used to validate a statistical model for risk of in-hospital mortality. The new risk score was compared with two existing scores by using area under the receiver operating characteristic curve (AUC). RESULTS: The new NEOCOSUR score was highly predictive for in-hospital mortality (AUC=0.85) and performed better than the Clinical Risk Index for Babies (CRIB) and the NICHD risk models when used in the NEOCOSUR Network. The new score is also well calibrated - it had good predictive capability for in-hospital mortality at all levels of risk (HL test=11.9, p=0.85). The new score also performed well when used to predict in hospital neurological and respiratory complications. CONCLUSIONS: A new and relatively simple VLBW mortality risk score had a good prediction performance in a South American network population. This is an important tool for comparison purposes among NICUs. This score may prove to be a better model for application in developing countries.
