Associated factors with neonatal near miss in twin pregnancies in a public referral maternity unit in Brazil

Objective: The aim was to analyze the factors associated with neonatal near miss (NNM) in twin pregnancies in a public referral maternity unit in Brazil. Material and Methods: This retrospective, cross-sectional study included 697 twin newborns. Cases of fetal and neonatal deaths were excluded. Neonates were divided into those meeting NNM criteria (5 min Apgar score <7, birth weight <1,500 g, gestational age at delivery <32 weeks, use of mechanical ventilation or congenital malformation, transfer before 28 days of life) and those who did not. In the bivariate analysis, the chi-square and Fisher's exact tests were used. Variables with a p-value ≤0.20 were subjected to the multiple analyses, which followed the Poisson regression model. Results: The cohort consisted of 130 (18.7%) neonates meeting NNM criteria and 567 (81.3%) with no NNM criteria after multiple analyses, the following variables were associated with NNM: no previous pregnancy, prevalence ratio (PR): 1.38 [95% confidence interval (CI), 1.03-1.85]; >3 previous pregnancies, PR: 1.93 (95% CI, 1.38-2.69); premature rupture of membranes, PR: 1.50 (95% CI, 1.70-2.12); intrauterine growth restriction, PR: 2.28 (95% CI, 1.53-3.33); premature labor, PR: 1.63 (95% CI, 1.13-2.35); resuscitation in the delivery room, PR: 1.80 (95% CI, 1.24-2.62); and transfusion of blood products, PR: 4.44 (95% CI, 3.14-6.28). Conclusion: The study findings indicate that having had 0 or >3 previous pregnancies, premature rupture of the membranes, intrauterine growth restriction, resuscitation in the delivery room, premature labor, and transfusion of blood products were associated with NNM in twin pregnancies.

Factors associated with neonatal near miss and death in public referral maternity hospitals / Fatores associados ao near miss e óbito neonatais em maternidade pública de referência

Abstract Objectives: to evaluate factors associated with neonatal near miss and death in reference hospitals. Methods: this case-control study included 364 cases and 728 controls among 4,929 births. Cases were identified by Apgar < 7 at 5 minutes, weight < 1500 g, gestational age <32 weeks, mechanical ventilation or congenital malformation. After follow-up, outcomes were reclassified into: true controls, near miss and neonatal death. Hierarchically, variables with a p-value < 0.20 were included in the multiple logistic regression. Results: the neonatal near miss rate was 54.1 per 1,000 live births, and the near-miss-to-death ratio was 2.75. Between the control and near miss groups, the predictor variables were neonatal intensive care admission [OR = 35.6 (16.7 - 75.9)] and central venous access [OR= 74.8 (29.4 - 190.4)]. Between the control and death groups, neonatal intensive care admission [OR = 100.4 (18.8 - 537.0)] and central venous access [OR = 12.7 (3.7 - 43.2)] were significant. Between the near miss and death groups, only Apgar < 7 at 5 minutes [OR = 4.1 (1.6 - 10.6)] and vasoactive drug use [OR = 42.2 (17.1 - 104.5)] were significant. Conclusion: factors associated with a greater chance of near miss and/or neonatal death were: Apgar score <7 at 5 minutes, neonatal intensive care confinement, having central venous access, and use of vasoactive drugs.

Resumo Objetivos: avaliar fatores associados à morbidade "near miss" e óbito neonatal em maternidade pública de referência. Métodos: estudo caso-controle com 4,929 nascimentos encontrou 364 casos e 728 controles. Os casos foram identificados pelos critérios: Apgar< 7 no 5° minuto, peso <1500g, idade gestacional < 32 semanas, ventilação mecânica ou malformação congênita. Reclassificou-sequanto aos desfechos: sobrevivência ao período neonatal sem critérios de near miss ("controles" verdadeiros), "near miss" e "óbito neonatal". Hierarquicamente, as variáveis com p< 0,20 foram incluídas na regressão logística múltipla. Resultados: a taxa de near miss neonatal foi 54,1 por mil nascidos vivos, a razão de near miss e óbito foi 2,75. As variáveis preditoras, entre controles e near miss foi internamento em terapia intensiva neonatal: OR 35,6 (16,7 - 75,9) e acesso venoso central: OR= 74,8 (29,4 -190,4); entre controles e óbito internamento em terapia intensiva neonatal: OR=100,4 (18,8 - 537,0)e acesso venoso central: OR 12,7 (3,7 - 43,2); entre near miss e óbito Apgar no 5°minuto < 7: OR= 4,1 (1,6 - 10,6) e uso de drogas vasoativas: OR= 42,2 (17,1 - 104,5). Conclusão: fatores associados à ocorrência de near miss e/ou óbito neonatal foram: Apgar < 7 no 5° minuto, internamento em terapia intensiva neonatal, acesso venoso central e drogas vasoativas.