Archives of Disease in Childhood - Fetal and Neonatal Edition
ObjectiveTo compare mortality and rates of significant neurosensory impairment (sNSI) at 18–36 mo... more ObjectiveTo compare mortality and rates of significant neurosensory impairment (sNSI) at 18–36 months’ corrected age in infants born extremely preterm across three international cohorts.DesignRetrospective analysis of prospectively collected neonatal and follow-up data.SettingThree population-based observational cohort studies: the Australian and New Zealand Neonatal Network (ANZNN), the Canadian Neonatal and Follow-up Networks (CNN/CNFUN) and the French cohort Etude (Epidémiologique sur les Petits Ages Gestationnels: EPIPAGE-2).PatientsExtremely preterm neonates of <28 weeks’ gestation in year 2011.Main outcome measuresPrimary outcome was composite of mortality or sNSI defined by cerebral palsy with no independent walking, disabling hearing loss and bilateral blindness.ResultsOverall, 3055 infants (ANZNN n=960, CNN/CNFUN n=1019, EPIPAGE-2 n=1076) were included in the study. Primary composite outcome rates were 21.3%, 20.6% and 28.4%; mortality rates were 18.7%, 17.4% and 26.3%; ...
Background In the NICU, interventions intended to enhance maternal sensitivity are indicated in o... more Background In the NICU, interventions intended to enhance maternal sensitivity are indicated in order to optimize preterm infant development and long-term mother-infant attachment. A novel nursing intervention was developed following a theory-oriented methodology and is based upon the guided participation theory for mothers to participate in their preterm infant’s therapeutic POSITioning and care (GP_Posit). The primary objective of this study is to evaluate the feasibility and acceptability of (i) the study design; and (ii) the experimental GP_Posit nursing intervention during NICU hospitalization. The secondary objective is to estimate the preliminary effects of GP_Posit on maternal and preterm infant outcomes. Methods A pilot parallel-group randomized clinical trial (RCT) was designed where mother-preterm infant dyads are being recruited and randomized to a control group (usual care) or experimental group (GP_Posit intervention). Data collection includes feasibility and acceptabi...
Pregnancy outcomes of women with serious injuries due to violence receive limited attention. We e... more Pregnancy outcomes of women with serious injuries due to violence receive limited attention. We examined the association of assault before and during pregnancy with maternal and infant outcomes at delivery. We performed a retrospective cohort study of 2,193,711 births in Quebec, Canada between 1989 and 2016. We identified women who were hospitalized for physical assault, sexual assault, and assault with documented intimate partner violence before and during pregnancy. We examined adverse outcomes at delivery, including preeclampsia, placental abruption, antepartum hemorrhage, stillbirth, preterm birth, low birthweight, and other disorders. In log-binomial regression models, we estimated risk ratios (RR) and 95% confidence intervals (CI) for the association between violence hospitalization and adverse birth outcomes, adjusted for potential confounders. Compared with no exposure, violence before or during pregnancy was associated with the future risk of placental abruption (RR 1.49, 9...
Preterm birth increases risk of cardiovascular disease and early death. A body of evidence sugges... more Preterm birth increases risk of cardiovascular disease and early death. A body of evidence suggests left ventricle (LV) echocardiographic alterations in children and adults born preterm. We aimed to determine if neonatal characteristics were associated with alterations in LV structure and function in preterm adults. We evaluated a cohort of 86 young adults born preterm below 30 weeks of gestation, and 85 full-term controls. We determined LV dimensions and function using tissue Doppler imaging, conventional and speckle tracking echocardiography (STE). Adults born preterm had smaller LV dimensions, but these differences did not remain after adjustment for body surface area (BSA), which was smaller in the preterm group. Stroke volume and cardiac output were reduced even after adjustment for BSA. We found a smaller e’ wave in the preterm group, but other markers of systolic and diastolic function did not differ. Use of antenatal steroids may be associated with a further reduced cardiac ...
Introduction/Background Bronchopulmonary dysplasia (BPD) is a common complication of extreme prem... more Introduction/Background Bronchopulmonary dysplasia (BPD) is a common complication of extreme prematurity and may require prolonged home respiratory support. BPD is associated with worse neurodevelopmental outcomes but the impact of home respiratory support on neurodevelopmental outcomes, rehospitalization rates and association with caregiver sociodemographics is less well studied. Objectives This study examines the impact of home respiratory support on neurodevelopmental outcomes in very preterm infants at 18-24 months corrected gestational age. Design/Methods This linked Canadian Neonatal Network and Canadian Neonatal Follow-Up Network (CNFUN) multicenter cohort study of infants born April 1, 2009-December 31, 2016 at <29 weeks’ gestational age assessed at 18-24 months corrected age at a CNFUN site compared significant neurodevelopmental impairment rates, rehospitalization rates and sociodemographics in children with and without home respiratory support using Chi-square and stud...
Background Preterm birth is associated with higher risk of death and severe neurodevelopmental im... more Background Preterm birth is associated with higher risk of death and severe neurodevelopmental impairment. There is an increased risk in extremely preterm infants, raising questions among ethicists and clinicians as to whether providing active care to infants born at the lower extreme is worth the outcomes, and if these outcomes are a source of decisional regrets for parents. Objectives Explore decisional regrets in parents of extremely preterm children. Design/Methods We consecutively recruited all parents of infants born <29 weeks’ gestational age, aged between 18 months corrected age and 7 years, and seen for neonatal follow-up at a single tertiary center over a one-year period. We asked the following question: “Knowing what you know now, is there anything you would have done differently?” Answers were analyzed independently by two reviewers using qualitative methodology, and discrepancies were resolved by a third reviewer. Mixed methods were used to examine the frequency of e...
BackgroundAlthough erythropoiesis is impaired and anaemia frequent in neonates born preterm, haem... more BackgroundAlthough erythropoiesis is impaired and anaemia frequent in neonates born preterm, haematopoiesis in adults born preterm has not been previously studied.ObjectiveWe, thus, aimed to evaluate haemoglobin and erythropoietin levels in young adults born preterm, to identify neonatal events associated with erythropoiesis in adulthood and to examine the relationships of haemoglobin levels with respiratory function and blood pressure.MethodsWe assessed a cohort of 101 young adults (ages 18–29) born preterm (≤29 weeks of gestation), in comparison to 105 full-term controls. We measured haemoglobin, erythropoietin levels and blood pressure. We also assessed respiratory function using spirometry.ResultsCompared with controls, tobacco use and sex-adjusted haemoglobin levels were 5.3 (95% CI 2.9 to 7.7) g/L higher in preterm-born individuals, but erythropoietin levels were similar. Duration of oxygen supplementation in the neonatal period was independently associated with higher haemogl...
Preterm birth incurs an increased risk of early cardiovascular events and death. In the general p... more Preterm birth incurs an increased risk of early cardiovascular events and death. In the general population, cardiovascular risk factors cluster in the context of inflammation and oxidative stress. Whether this also occurs in young adults born preterm is unknown. We analyzed 101 healthy young adults (ages 18–29) born preterm (≤29 weeks of gestation) and 105 full-term controls, predominantly (90%) white. They underwent a comprehensive clinical and biological evaluation, including measurement of blood pressure, lung function (spirometry), glucose metabolism (fasting glucose, glycated hemoglobin, and oral glucose tolerance test), as well as biomarkers of inflammation and oxidative stress. Individuals born preterm were at higher risk than those born full-term of stage ≥1 hypertension (adjusted odds ratio, 2.91 [95% CI, 1.51–5.75]), glucose intolerance (adjusted odds ratio, 2.22 [95% CI, 1.13–4.48]), and airflow limitation (adjusted odds ratio, 3.47 [95% CI, 1.76–7.12]). Hypertension was ...
Archives of Disease in Childhood - Fetal and Neonatal Edition
ObjectiveTo compare mortality and rates of significant neurosensory impairment (sNSI) at 18–36 mo... more ObjectiveTo compare mortality and rates of significant neurosensory impairment (sNSI) at 18–36 months’ corrected age in infants born extremely preterm across three international cohorts.DesignRetrospective analysis of prospectively collected neonatal and follow-up data.SettingThree population-based observational cohort studies: the Australian and New Zealand Neonatal Network (ANZNN), the Canadian Neonatal and Follow-up Networks (CNN/CNFUN) and the French cohort Etude (Epidémiologique sur les Petits Ages Gestationnels: EPIPAGE-2).PatientsExtremely preterm neonates of <28 weeks’ gestation in year 2011.Main outcome measuresPrimary outcome was composite of mortality or sNSI defined by cerebral palsy with no independent walking, disabling hearing loss and bilateral blindness.ResultsOverall, 3055 infants (ANZNN n=960, CNN/CNFUN n=1019, EPIPAGE-2 n=1076) were included in the study. Primary composite outcome rates were 21.3%, 20.6% and 28.4%; mortality rates were 18.7%, 17.4% and 26.3%; ...
Background In the NICU, interventions intended to enhance maternal sensitivity are indicated in o... more Background In the NICU, interventions intended to enhance maternal sensitivity are indicated in order to optimize preterm infant development and long-term mother-infant attachment. A novel nursing intervention was developed following a theory-oriented methodology and is based upon the guided participation theory for mothers to participate in their preterm infant’s therapeutic POSITioning and care (GP_Posit). The primary objective of this study is to evaluate the feasibility and acceptability of (i) the study design; and (ii) the experimental GP_Posit nursing intervention during NICU hospitalization. The secondary objective is to estimate the preliminary effects of GP_Posit on maternal and preterm infant outcomes. Methods A pilot parallel-group randomized clinical trial (RCT) was designed where mother-preterm infant dyads are being recruited and randomized to a control group (usual care) or experimental group (GP_Posit intervention). Data collection includes feasibility and acceptabi...
Pregnancy outcomes of women with serious injuries due to violence receive limited attention. We e... more Pregnancy outcomes of women with serious injuries due to violence receive limited attention. We examined the association of assault before and during pregnancy with maternal and infant outcomes at delivery. We performed a retrospective cohort study of 2,193,711 births in Quebec, Canada between 1989 and 2016. We identified women who were hospitalized for physical assault, sexual assault, and assault with documented intimate partner violence before and during pregnancy. We examined adverse outcomes at delivery, including preeclampsia, placental abruption, antepartum hemorrhage, stillbirth, preterm birth, low birthweight, and other disorders. In log-binomial regression models, we estimated risk ratios (RR) and 95% confidence intervals (CI) for the association between violence hospitalization and adverse birth outcomes, adjusted for potential confounders. Compared with no exposure, violence before or during pregnancy was associated with the future risk of placental abruption (RR 1.49, 9...
Preterm birth increases risk of cardiovascular disease and early death. A body of evidence sugges... more Preterm birth increases risk of cardiovascular disease and early death. A body of evidence suggests left ventricle (LV) echocardiographic alterations in children and adults born preterm. We aimed to determine if neonatal characteristics were associated with alterations in LV structure and function in preterm adults. We evaluated a cohort of 86 young adults born preterm below 30 weeks of gestation, and 85 full-term controls. We determined LV dimensions and function using tissue Doppler imaging, conventional and speckle tracking echocardiography (STE). Adults born preterm had smaller LV dimensions, but these differences did not remain after adjustment for body surface area (BSA), which was smaller in the preterm group. Stroke volume and cardiac output were reduced even after adjustment for BSA. We found a smaller e’ wave in the preterm group, but other markers of systolic and diastolic function did not differ. Use of antenatal steroids may be associated with a further reduced cardiac ...
Introduction/Background Bronchopulmonary dysplasia (BPD) is a common complication of extreme prem... more Introduction/Background Bronchopulmonary dysplasia (BPD) is a common complication of extreme prematurity and may require prolonged home respiratory support. BPD is associated with worse neurodevelopmental outcomes but the impact of home respiratory support on neurodevelopmental outcomes, rehospitalization rates and association with caregiver sociodemographics is less well studied. Objectives This study examines the impact of home respiratory support on neurodevelopmental outcomes in very preterm infants at 18-24 months corrected gestational age. Design/Methods This linked Canadian Neonatal Network and Canadian Neonatal Follow-Up Network (CNFUN) multicenter cohort study of infants born April 1, 2009-December 31, 2016 at <29 weeks’ gestational age assessed at 18-24 months corrected age at a CNFUN site compared significant neurodevelopmental impairment rates, rehospitalization rates and sociodemographics in children with and without home respiratory support using Chi-square and stud...
Background Preterm birth is associated with higher risk of death and severe neurodevelopmental im... more Background Preterm birth is associated with higher risk of death and severe neurodevelopmental impairment. There is an increased risk in extremely preterm infants, raising questions among ethicists and clinicians as to whether providing active care to infants born at the lower extreme is worth the outcomes, and if these outcomes are a source of decisional regrets for parents. Objectives Explore decisional regrets in parents of extremely preterm children. Design/Methods We consecutively recruited all parents of infants born <29 weeks’ gestational age, aged between 18 months corrected age and 7 years, and seen for neonatal follow-up at a single tertiary center over a one-year period. We asked the following question: “Knowing what you know now, is there anything you would have done differently?” Answers were analyzed independently by two reviewers using qualitative methodology, and discrepancies were resolved by a third reviewer. Mixed methods were used to examine the frequency of e...
BackgroundAlthough erythropoiesis is impaired and anaemia frequent in neonates born preterm, haem... more BackgroundAlthough erythropoiesis is impaired and anaemia frequent in neonates born preterm, haematopoiesis in adults born preterm has not been previously studied.ObjectiveWe, thus, aimed to evaluate haemoglobin and erythropoietin levels in young adults born preterm, to identify neonatal events associated with erythropoiesis in adulthood and to examine the relationships of haemoglobin levels with respiratory function and blood pressure.MethodsWe assessed a cohort of 101 young adults (ages 18–29) born preterm (≤29 weeks of gestation), in comparison to 105 full-term controls. We measured haemoglobin, erythropoietin levels and blood pressure. We also assessed respiratory function using spirometry.ResultsCompared with controls, tobacco use and sex-adjusted haemoglobin levels were 5.3 (95% CI 2.9 to 7.7) g/L higher in preterm-born individuals, but erythropoietin levels were similar. Duration of oxygen supplementation in the neonatal period was independently associated with higher haemogl...
Preterm birth incurs an increased risk of early cardiovascular events and death. In the general p... more Preterm birth incurs an increased risk of early cardiovascular events and death. In the general population, cardiovascular risk factors cluster in the context of inflammation and oxidative stress. Whether this also occurs in young adults born preterm is unknown. We analyzed 101 healthy young adults (ages 18–29) born preterm (≤29 weeks of gestation) and 105 full-term controls, predominantly (90%) white. They underwent a comprehensive clinical and biological evaluation, including measurement of blood pressure, lung function (spirometry), glucose metabolism (fasting glucose, glycated hemoglobin, and oral glucose tolerance test), as well as biomarkers of inflammation and oxidative stress. Individuals born preterm were at higher risk than those born full-term of stage ≥1 hypertension (adjusted odds ratio, 2.91 [95% CI, 1.51–5.75]), glucose intolerance (adjusted odds ratio, 2.22 [95% CI, 1.13–4.48]), and airflow limitation (adjusted odds ratio, 3.47 [95% CI, 1.76–7.12]). Hypertension was ...
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Papers by Thuy Mai Luu