Maternal and Fetal Risk Factors Associated With Late Preterm Infants

Abstract

Objective: To determine maternal and fetal risk factors associated with the birth of late preterm infants in comparison to those born at term. Methods: A case-control study was carried out in a tertiary center for high-risk pregnancies. For the cases, the study enrolled post-partum mothers and their respective newborns with gestational ages equal or greater than 34 weeks and less than 37 weeks. As controls, the post-partum mothers and their newborns with gestational ages of 37 weeks or greater were selected. The sample was calculated with a ratio of two controls for each case, resulting in 423 patients. Association studies were performed using the chi-square test or Fisher’s exact test and logistic regression analysis. Results: The variables associated with late prematurity were inadequate prenatal (Odds Ratio [OR] 1.23; confidence interval of 95% [95%CI] 1.12-1.34; p≤0.001), premature rupture of membranes (OR 4.98; 95%CI 2.66-9.31; p≤0.001), length of hospital stay ≥24 hours until birth (OR 0.18; 95%CI 0.06-0.52; p≤0.001), cesarean section (OR 2.74; 95%CI 1.69-4.44; p≤0.001) and small for gestational age newborn (OR 3.02; 95%CI 1.80-5.05; p≤0.001). Conclusions: Inadequate prenatal care and membranes’ premature rupture were found as factors associated with the late preterm birth. It is important to identify the factors that allow intervention with adequate prenatal care in order to reduce poor outcomes due to late prematurity.

Divergências metodológicas entre os estudos que avaliaram a associação entre as síndromes hipertensivas da gestação e a prematuridade: uma revisão integrativa da literatura

“…A maioria dos estudos selecionados para compor essa revisão (Oliveira et al (2006) Embora o estudo conduzido por Mora et al (2010) tenha sido realizado antes da publicação do Relatório de Ação Global da Prematuridade da OMS em 2012, observou-se que os autores utilizaram essa classificação (<28; 28 a 32 e 33 a 36 semanas gestacionais). É importante destacar que a avaliação da prematuridade em categorias é de extrema importância, dado que a idade gestacional é inversamente proporcional ao risco de complicações neonatais, ao aumento dos cuidados e à mortalidade neonatal (Phillips et al, 2017;Vanin et al, 2020).…”

Factors Associated With Late Prematurity in the University Hospital of Valle Cali, Colombia During 2013–2014

“…On account of the studies mentioned and the results observed in this research, the population of late premature infants has a greater association of short and long term complications compared to those born at term. Late premature infants have significant morbidity (its outcome non-lethal in the majority of investigations), are associated with disabilities, decreased quality of life and increased costs to the health services (25,26).…”

Perfil de cesarianas de uma maternidade do interior do Rio Grande do Sul

“…Mulheres ( Uma gestação a termo, descreve-se entre 37 e 41 semanas, sendo até 36 semanas e seis dias considerado pré-termo e após 41 semanas, pós termo (Vanin et al, 2020). Nesta pesquisa observou-se que mais de 90% das mulheres estavam em idade gestacional a termo, 9,4% era pós termo e apenas um caso de prematuridade no período, fato que é demonstrado na tabela 1:…”