Comparison of mortality and survival without major morbidities of very preterm infants with very low birth weight from Japan and Brazil / Comparação entre mortalidade e sobrevida sem morbidades importantes dos recém-nascidos prematuros de muito baixo peso entre o Japão e o Brasil

Abstract Objective: This study was carried out to understand the disparities in mortality and survival without major morbidities among very premature and very low birth weight infants between participating Neonatal Intensive Care Units (NICUs) from the Brazilian Network on Neonatal Research (RBPN) and the Neonatal Research Network of Japan (NRNJ). Methods: Secondary data analysis of surveys by the RBPN and NRNJ was performed. The surveys were conducted in 2014 and 2015 and included 187 NICUs. Primary outcome was mortality or survival without any major morbidity. Logistic regression analysis adjustment for confounding factors was used. Results: The study population consisted of 6,406 infants from the NRNJ and 2,319 from the RBPN. Controlling for various confounders, infants from RBPN had 9.06 times higher adjusted odds of mortality (95%CI 7.30-11.29), and lower odds of survival without major morbidities (AOR 0.36; 95%CI 0.32-0.41) compared with those from the NRNJ. Factors associated with higher odds of mortality among Brazilian NICUs included: Air Leak Syndrome (AOR 4.73; 95%CI 1.26-15.27), Necrotizing Enterocolitis (AOR 3.25; 95%CI 1.38-7.26), and Late Onset Sepsis (LOS) (AOR 4.86; 95%CI 2.25-10.97). Conclusions: Very premature and very low birth weight infants from Brazil had significantly higher odds for mortality and lower odds for survival without major morbidities in comparison to those from Japan. Additionally, we identified the factors that increased the odds of in-hospital neonatal death in Brazil, most of which was related to LOS.

RESUMO Objetivo: Este estudo foi realizado para compreender as disparidades na mortalidade e sobrevivência sem as principais morbidades entre recém-nascidos muito prematuros e de muito baixo peso entre Unidades de Terapia Intensiva Neonatal (UTINs) participantes da Rede Brasileira de Pesquisas Neonatais (RBPN) e Rede de Pesquisa Neonatal do Japão (NRNJ). Métodos: Foi realizada uma análise dos dados secundários dos bancos de dados da RBPN e da NRNJ. As pesquisas foram realizadas em 2014 e 2015 e incluíram 187 UTINs. O desfecho primário foi mortalidade ou sobrevida sem qualquer morbidade importante. Utilizou-se a análise de regressão logística com ajuste para os fatores de confusão. Resultados: A população do estudo foi composta por 6.406 recém-nascidos do NRNJ e 2.319 do RBPN. Ajustando para diversos fatores de confusão, os prematuros da RBPN tiveram 9,06 vezes maiores chances de mortalidade (IC95% 7,30-11,29) e menores chances de sobrevivência sem morbidades importantes (AOR 0,36; IC95% 0,32-0,41) em comparação com os da NRNJ. Fatores associados a maiores chances de mortalidade entre as UTINs brasileiras incluíram: síndrome de escape de ar (AOR 4,73; IC95% 1,26-15,27), enterocolite necrosante (AOR 3,25; IC95% 1,38-7,26) e sepse de início tardio (AOR 4,86; IC95% 2,25-10,97). Conclusões: Os recém-nascidos muito prematuros e de muito baixo peso do Brasil apresentaram chances significativamente maiores de mortalidade e menores chances de sobrevivência sem as principais morbidades em comparação aos do Japão. Além disso, identificamos os fatores que aumentam as chances da morte neonatal no Brasil, sendo a maioria relacionada à sepse tardia.

Multivariable Predictive Models of Death or Neurodevelopmental Impairment Among Extremely Low Birth Weight Infants Using Heart Rate Characteristics.

OBJECTIVE: We hypothesized that a cumulative heart rate characteristics (HRC) index in real-time throughout the neonatal intensive care unit (NICU) hospitalization, alone or combined with birth demographics and clinical characteristics, can predict a composite outcome of death or neurodevelopmental impairment (NDI). STUDY DESIGN: We performed a retrospective analysis using data from extremely low birth weight infants who were monitored for HRC during neonatal intensive care. Surviving infants were assessed for NDI at 18-22 months of age. Multivariable predictive modeling of subsequent death or NDI using logistic regression, cross-validation with repeats, and step-wise feature elimination was performed each postnatal day through day 60. RESULTS: Among the 598 study participants, infants with the composite outcome of death or moderate-to-severe NDI had higher mean HRC scores during their stay in the NICU (3.1 ± 1.8 vs 1.3 ± 0.8; P < .001). Predictive models for subsequent death or NDI were consistently higher when the cumulative mean HRC score was included as a predictor variable. A parsimonious model including birth weight, sex, ventilatory status, and cumulative mean HRC score had a cross-validated receiver-operator characteristic curve as high as 0.84 on days 4, 5, 6, and 8 and as low as 0.78 on days 50-52 and 56-58 to predict subsequent death or NDI. CONCLUSIONS: In extremely low birth weight infants, higher mean HRC scores throughout their stay in the NICU were associated with a higher risk of the composite outcome of death or NDI. TRIAL REGISTRATION: ClinicalTrials.gov: NCT00307333.

Pulse Oximeter Saturation Targeting and Oximeter Changes in the Benefits of Oxygen Saturation Targeting (BOOST)-II Australia and BOOST-II UK Oxygen Trials.

Infants in the Australian and UK Benefits of Oxygen Saturation Targeting-II trials treated using revised oximeters spent more time within their planned pulse oximeter saturation target ranges than infants treated using the original oximeters (P < .001). This may explain the larger mortality difference seen with revised oximeters. If so, average treatment effects from the Neonatal Oxygen Prospective Meta-analysis trials may be underestimates.

Calidad del seguimiento clínico y neurológico en una cohorte de recién nacidos muy prematuros, 2002-2012 / Quality of clinical and neurologic monitoring in a cohort of extremely premature infants, 2002-2012

Objetivo Explorar el curso clínico de una cohorte de recién-nacidos <1000 gr o <29 semanas de edad gestacional al nacer, luego del alta del Programa Madre Canguro (PMC). Método Encuesta telefónica a padres de una cohorte retrospectiva de 569 prematuros manejados en tres PMC entre 2002 y 2012. Resultados Se contactó 65,4 % de la cohorte a una mediana de edad de 4 años. Un total de 34 pacientes (6 %) fallecieron, 65 % en los primeros 6 meses de vida. Se rehospitalizaron 63 %, 32 % presentaban antecedente de hemorragia intraventricular, 30 % tenían Enfermedad Pulmonar Crónica, 5,2 % parálisis cerebral o retardo mental y 2,7 % convulsiones. Un 72 % se controlaron por Pediatra, 65 % necesitaron terapia física y 39 % terapia del lenguaje. El 7 % repitió años escolares y 9 % de los mayores de 4 años no había iniciado escritura. Un 4 % de los que ya escribían, presentaba dificultades. Un 81 % de los mayores de 6 años presentaba dificultad para vestirse y 55 % no practicaba ningún deporte. Discusión Los prematuros extremamente inmaduros o de bajo peso tienen una tasa elevada de secuelas respiratorias y neurológicas que impactan su calidad de vida y la de su familia. Es importante continuar con un seguimiento estricto después de 12 meses para detectar y manejar a tiempo las alteraciones del desarrollo neuro-psicomotor.(AU)

Objective To explore the clinical course of a cohort of newborns <1000 gr or <29 weeks of gestational age at birth after discharge from the Kangaroo Mother Care Program (KMC). Method Telephone surveys with parents of a cohort of 569 premature babies treated in 3 KMC programs between 2002 and 2012. Results The study contacted 65.4 % of the cohort, averaging 4 years old. 34 patients (6 %) passed away, 65 % during the first 6 months of life. 63 % were re-hospitalized, 32 % presented antecedents of intraventricular hemorrhage, 30 % had chronic lung disease, 5.2 % had cerebral palsy or mental retardation, and 2.7 % had convulsions. 72 % were monitored by a pediatrician, 65 % needed physical therapy, and 39 % needed speech therapy. 7 % repeated years in school and 9% of those over 4 years old had not begun to write. 4 % of those who could write had difficulties. 81 % of those over 6 years old had difficulties dressing themselves; 55 % did not practice sports. Discussion Extremely premature or low birth weight premature babies have a higher level of respiratory and neurological consequences that affect their quality of life and that of their family. It is important to strictly monitor their health after 12 months in order to promptly detect and manage neuro-psychomotor and sensorial development disorders.(AU)