Objectives: To determine the 5th, 10th, 50th, 90th and 95th birth weight percentiles of newborns from normal singleton pregnant women without pathology at 3 400 m above sea level (Cusco). Design: Descriptive and retrospective study. Setting: Adolfo Guevara Velazco National Hospital, EsSalud, Cusco, Peru. Participants: Newborns. Interventions: Birth weight analysis of 8 500 normal neonates recorded between 1998 and 2006 in the Perinatal Information System database. Results: Only the 36 through 42 weeks neonates showed appropriate number of cases to be analyzed. We obtained the 5th, 10th, 50th, 90th, and 95th percentiles of newborns birth weights. Conclusions: Male newborns birth weights were higher than female neonates and increased through gestation.

Objectives: To determine the 5th, 10th, 50th, 90th and 95th birth weight percentiles of newborns from normal singleton pregnant women without pathology at 3 400 m above sea level (Cusco). Design: Descriptive and retrospective study. Setting: Adolfo Guevara Velazco National Hospital, EsSalud, Cusco, Peru. Participants: Newborns. Interventions: Birth weight analysis of 8 500 normal neonates recorded between 1998 and 2006 in the Perinatal Information System database. Results: Only the 36 through 42 weeks neonates showed appropriate number of cases to be analyzed. We obtained the 5th, 10th, 50th, 90th, and 95th percentiles of newborns birth weights. Conclusions: Male newborns birth weights were higher than female neonates and increased through gestation.

Estudio descriptivo retrospectivo realizado en el Hospital Nacional Adolfo Guevara Velazco de EsSalud, Cusco, con el objetivo de conocer los percentiles 5, 10, 50, 90 y 95 del peso al nacer en neonatos que provienen de madres con gestación única, sin patología, a 3 400 m de altura. Entre los años 1999 y 2006, se evaluó en el Sistema de Vigilancia Perinatal el peso al nacer de 8 500 neonatos provenientes de gestaciones únicas normales. Solamente los neonatos entre la semana 36 y 42 mostraron un número adecuado para la evaluación estadística y se obtuvo los percentiles 5,10, 50, 90 y 95 del peso al nacer. En conclusión, el peso al nacer de los niños que nacen a 3 400 m de altura son algo diferentes a los del nivel del mar, por lo cual es importante definir los rangos normales que aquí se presentan para una evaluación adecuada.

Introducción: El crecimiento fetal en altura es menor en comparación al nivel del mar, debido a la hipoxia hipobárica existente. Consecuentemente hay menores medidas antropométricas neonatales. No hay información acerca de la capacidad de predicción de morbimortalidad neonatal usando los criterios de Lubchenco y Battaglia con la tabla creada a 3400 m de altura (TANA). Material y Métodos: Estudio de casos y controles. Usamos la información de 16 000 neonatos a término del Hospital Nacional Adolfo Guevara Velazco en Cusco, desde enero del 2003 a junio del 2012. Evaluamos el percentil 3, 10, 90 y 97 (P3, P10, P90 y P97) de los pesos e índice ponderal al nacer (IP). Neonatos con antropometría menor al P3 y P10 fueron considerados pequeños (PEG) y los mayores al P90 y P97 grandes para edad gestacional (GEG). Estos fueron considerados los casos, mientras aquellos con medidas entre ...

Background: The fetus growth at high altitude is less than at sea level due to hypobaric hypoxia. Consequently, there are small neonatal anthropometric measurements. Therefore, there is no information about predicting neonatal morbi-mortality using Battaglia and Lubchenco criteria by neonatal curve created at 3400-m altitude (TANA). Material and Methods: It was a case-control study. We used the information of 16000 term infants from the Adolfo Guevara Velazco National Hospital in Cusco, from January 1, 2003, to June 30, 2012. We evaluated the 3rd, 10th, 90th, and 97th percentile (P3, P10, P90, and P97) of newborns weight and ponderal index (PI). Neonatal anthropometry less than P3 or P10 (SGA) and higher than P90 or P97 (LGA) were the cases, and those with measurements between these intervals were the controls (AGA). Results: SGA (P10) prevalence was 9.6% and 10.7% of LGA (P90). The P3 o...