6 Study Designs
Fuchs H, et al. Arch Dis Child Fetal Neonatal Ed. 2011;96(5):F343–F347.
A retrospective, single-center, observational cohort study conducted at the University Children’s Hospital of the University of Ulm, Germany, evaluating early nasal CPAP failure in very preterm infants. The study included all inborn infants born alive between January 2005 and June 2008 with a gestational age of 23 to 28 weeks who were managed with early nasal CPAP as first-line respiratory support (n=225). Infants were analyzed according to their clinical course, including those intubated in the delivery room and those initially stabilized on nasal CPAP, nasal CPAP success (no intubation within the first 48 hours of life) or nasal CPAP failure (intubation within the first 48 hours of life).1
De Jaegere AP, et al. Acta Paediatr. 2021;111(1):54–61.
A retrospective, single-center, observational cohort study conducted at the Emma Children’s Hospital Academic Medical Center in Amsterdam that aimed to develop a prediction model for early nasal CPAP failure in very preterm infants. The study included inborn infants with a gestational age <30 weeks who were managed with primary nasal CPAP at NICU admission and were born between August 2006 and December 2008 (n=182). Infants were classified post hoc as nasal CPAP success or nasal CPAP failure, defined as the requirement for endotracheal intubation and mechanical ventilation within the first 72 hours of life. The risk for nasal CPAP failure was estimated by multivariable logistic regression analysis with dichotomized determinants.2
Rocha G, et al. J Perinatol. 2013;33(4):297–301.
A prospective, multicenter, observational cohort study conducted across 6 level III neonatal centers in northern Portugal to identify predictors of nasal CPAP failure in moderately to very preterm infants. The study prospectively enrolled inborn preterm neonates with a gestational age of 26 to 29 weeks who were started on nasal CPAP as initial respiratory support in the delivery room or shortly after NICU admission and were born between January 2010 and December 2011 (n=131). Infants were classified according to clinical course as nasal CPAP success or nasal CPAP failure, defined as the requirement for invasive mechanical ventilation within the first 72 hours of life.3
Dargaville PA, et al. Neonatology. 2013;104(1):8–14.
A retrospective, observational study of data collected from June 2006 to June 2009 at the Royal Hobart Hospital and from May 2009 to April 2010 at the Royal Women’s Hospital, Melbourne. Preterm infants (25–32 weeks GA, N=297) who were admitted to the NICU for respiratory support in the first 24 hours of life and managed initially with CPAP (maximum CPAP pressure of 8 cm H2O and FiO2 0.45–0.50) were included. CPAP failure was defined as the need for intubation before 72 hours. Data were separated into 2 gestation ranges (25–28 weeks and 29–32 weeks) and grouped according to whether the infants were successfully managed on or failed CPAP. Logistic regression models were used to investigate the effects of FiO2 and CPAP levels in early life in the prediction of CPAP failure. The highest values for FiO2 and CPAP in the first 2 hours (25–28 weeks) or 6 hours (29–32 weeks) were used.4
Kakkilaya V, et al. J Perinatol. 2019;39(8):1081–1088.
A single-center, retrospective study from the University of Texas Parkland Hospital and Health System Medical Center from January 2013 to April 2018. All preterm infants 23 to 29 weeks GA admitted to NICU on CPAP were included and randomly assigned to either a modeling cohort or validation cohort in a 2:1 ratio. Variables available within 2 hours of life were compared between the CPAP-failure group and the CPAP-success group.5
Gulczyńska E, et al. Neonatology. 2019;116(2):171–178.
A multicenter, prospective study conducted from October 2016 to January 2018 in Poland. Preterm infants <30 weeks gestation at risk for RDS admitted to the NICU in whom CPAP was initiated within the first 15 minutes after birth were included. The incidence of CPAP failure was defined as the percentage of infants requiring invasive ventilation within the first 72 hours of life. The criteria for surfactant administration were FiO2 >0.3 in infants ≤26 weeks and >0.4 in infants >26 weeks. FiO2 in the first hours of life was defined as the highest oxygen concentration delivered to maintain a target saturation range of 90% to 94%, as recommended by the 2016 European RDS guidelines. FiO2 threshold was determined with ROC curve analysis.6