Antenatal vs Postnatal Transport Team Positioning in Extremely Preterm Outborn Infants (OutbornTRANSF)
A Prospective French National Study of the Impact of Antenatal Versus Postnatal Positioning of a Neonatal Transport Team on Survival and Severe Neurodevelopmental Delay at Two Years in Outborn 23-28 Weeks Infants : outbornTRANSFER Study Protocol
The extremely preterm outborn births (delivered in maternity units without on-site neonatal intensive care) are associated with lower survival and increased risk of severe neurodevelopmental impairment compared with inborn births (delivered in maternity units with on-site neonatal intensive care).
This project aims to assess the effect of the neonatal transport team (NNT) antenatal versus postnatal positioning on outborn survival without major neurodevelopmental sequelae at two years of corrected age (CA). A national, multicenter, observational cohort will be established over a two-year period, including all outborn births between 23+0-28+6 weeks' gestation in mainland France for which a NNT is deployed and who are alive at the moment of arrival of the NNT. 627 infants born outborn and their families will be followed until the child reaches two years of corrected age.
Study will examine quality of neonatal resuscitation, stability during transport, neonatal morbidity, parental mental health and quality of life, medico-economic outcomes for both families and the healthcare system and regional provision of care.
If parents agree to participate after receiving appropriate information, hospital records will be used to collect maternal and neonatal characteristics as well as morbidity data. Telephone follow-up will be conducted one month after discharge and then every six months until 2 years of corrected age (CA). Neurodevelopment at 2 years of corrected age will be assessed using the ASQ-3, completed by the parents.
Through a detailed understanding of the processes of resuscitation, stabilization and transport, our goal is to reduce unnecessary deaths and disability for children and families, including long-term economic costs. The recommendations for the care of outborn preterm infants and for the optimization of NNT resources will be developed.
調査の概要
詳細な説明
Numerous studies have shown that outborn preterm infants born at 23+0-28+6 weeks' gestation in maternity units without on-site neonatal intensive care unit (NICU) have higher rates of mortality and severe disability compared with inborn infants (delivered in maternity units with on-site neonatal intensive care). These differences are partly explained by variations in maternal characteristics, as well as in resuscitation and transport conditions. To date, no study has evaluated the impact of the presence of a neonatal transport team (NNT) beyond short-term transport-related complications.
The primary objective is to assess the effect of the antenatal NNT positioning, compared with postnatal NNT positioning, on survival without major neurodevelopmental sequelae at two years of corrected age (CA) in outborn preterm infants born at 23+0-28+6 weeks' gestation.
Secondary objectives will evaluate the effects on morbidity and mortality and neonatal health, medical interventions and the infant's stability during transport, healthcare utilization, as well as parents' experiences, mental health, and quality of life throughout follow-up. Cost-effectiveness and budget impact will also be examined, along with social and geographic inequalities in morbidity and mortality at two years. Barriers to and facilitators of organizing pediatric transport for outborn preterm infants will be identified in collaboration with neonatal transport teams.
The population included in the OutbornTRANSFER study are extremely preterm newborns born in mainland France in a maternity unit without on-site neonatal intensive care, and managed by one of the 32 specialized neonatal transport teams.
A national, multicenter, observational, longitudinal cohort will be established over a two-year period, including all outborn births between 23+0-28+6 weeks' gestation for which a NNT is deployed and who are alive at the moment of arrival of the NNT. Preterm outborn infants and their families will be followed until the child reaches two years of corrected age.
An economic evaluation will also be conducted, as well as a mixed-method study among medical professionals from participating NNT.
If the infant survives and is transported to a neonatal intensive care unit, the NNT investigator will inform the parents about the study and invite them to participate. If the investigator is unable to meet the parents, an information leaflet and a flyer (including a unique identification number and a QR code) will be placed in the child's health record booklet, enabling parents to access a study-specific electronic data collection application and to provide their non-opposition online.
Data on birth, initial care, transport, and timing of NNT positioning will be collected using the NNT data transportation sheet dedicated to the study, completed by the NNT study investigator.
The NNT study investigator will obtain hospitalization discharge reports, which include relevant medical history, pregnancy course, birth details, and the infant's hospital stay, with particular focus on severe conditions relevant to the cohort's outcome measures.
One month after hospital discharge, a research assistant will contact both parents to re-explain the telephone follow-up procedures, including the collection of data on parental experiences during hospitalization, parental mental health, and health-related quality of life since discharge. Subsequent telephone assessments will be conducted at 6, 12, 18, and 24 months corrected age.
A collaboration will be established with the Vulnerable Children Network (Réseau de Suivi des Enfants Vulnérables - RSEV), which organizes and performs auditory, ophthalmological, psychological, and physical assessments of premature infants, including the Ages and stages questionnaire (ASQ). One month prior to the infant's 24-month corrected age visit, the research assistant will contact the parents to present the ASQ-3 and encourage completion during the RSEV pediatric visit or directly via the study web app if they do not participate in the network follow-up. The research assistant will then collect the reports from the RSEV pediatrician for the 24-month visit.
The investigators will link the cohort data with data from national health data system (SNDS - Système National des Données de Santé) to evaluate healthcare consumptions by the mother (and subsequently the premature infant) during pregnancy and up to 24 months corrected age of the infant.
研究の種類
入学 (推定)
連絡先と場所
研究連絡先
- 名前：Peter JONES, MB BChir PhD
- 電話番号：+33 06 12 34 76 82
- メール：peter.jones@aphp.fr
研究場所
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Pontoise、フランス、95300
- SAMU de Pontoise, Hopital Novo
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コンタクト：
- Guillaume POIRIE, MD
- 電話番号：+33 06 30 61 08 13
- メール：guillaume.poirie@ght-novo.fr
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参加基準
適格基準
就学可能な年齢
- 子
健康ボランティアの受け入れ
サンプリング方法
調査対象母集団
説明
Eligible for inclusion are infants for whom an antenatal call to the emergency medical service (SAMU) was initiated due to prematurity (imminent delivery and infant alive at the time of the call) and who:
- Were born outside a level 3 maternity hospital (outborn birth) in mainland France
- Have a gestational age at birth between of 23+0 - 28+6
- Have parents who speak and understand French (required for telephone follow-up) To assess parent-related outcomes, parents will also be included in the study if their infant is eligible and if they have not objected to participation.
Infants will not be included if one or both parents are unable to speak and understand French, if at least one of the parents is opposed to inclusion, if they had lethal congenital malformations or if they were born outside hospital (accidental premature home births).
研究計画
研究はどのように設計されていますか？
デザインの詳細
コホートと介入
グループ/コホート |
介入・治療 |
|---|---|
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Outborn Infants
Extremely preterm infants born at 23+0-28+6 weeks' gestation in maternity units without on-site neonatal intensive care.
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Children will be followed using each participating center's usual practices.
Parental experiences of hospitalization, parental mental health and health-related quality of life since discharge will be assessed by telephone at 6, 12, 18, and 24 months of corrected age.
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この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Survival without major neurodevelopmental disability
時間枠：at 2 years corrected gestational age
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The primary outcome is a binary composite criteria based on three elements: 1) Survival ; 2) Absence of severe or moderate neuromotor or sensory disability at 2 yearsAC (defined as cerebral palsy with levels 2 to 5 of the gross motor classification system (GMFCS), blindness, or unilateral or bilateral deafness), allowing the application of the ASQ-3; 3) Absence of neurodevelopmental sequelae at 2 yearsAC assessed by the Age and Stage Questionnaire version 3 (the ASQ-3.).
It is a parental questionnaire (completed by one or both parents together), based on their observations of their child's development.
A developmental delay is defined as a score of < -2SD in one of the five subdomains of the questionnaire.
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at 2 years corrected gestational age
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Mortality
時間枠：From inclusion (birth) up to one year of corrected age
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Number of death during the first year (infant), the first 28 days (neonatal), the first week (early neonatal) and during hospital stay (in-hospital mortality)
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From inclusion (birth) up to one year of corrected age
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Severe neurological sequelae
時間枠：At the end of the initial period of hospitalisation, an average at 4 months after birth (inclusion)
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Binary composite criteria based on the absence of periventricular leukomalacia (cavities in the periventricular white matter during transfontanellar ultrasound) or stage 3 intraventricular hemorrhage (IVH) with associated ventricular dilatation or stage 4 IVH associated with hemorrhagic lesions in the adjacent parenchyma during transfontanellar ultrasound
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At the end of the initial period of hospitalisation, an average at 4 months after birth (inclusion)
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Severe morbidity
時間枠：At the end of the initial period of hospitalisation, an average at 4 months after birth (inclusion)
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Composite morbidity criteria defined by the absence of :
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At the end of the initial period of hospitalisation, an average at 4 months after birth (inclusion)
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Hemodynamic, respiratory, and thermal parameters
時間枠：At birth
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Average change in hemodynamic (BP, HR), respiratory (RR, SaO₂, FiO₂) and thermal (skin sensor temperature) parameters between departure from the maternity ward and arrival in intensive care.
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At birth
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Time from birth to arrival in intensive care
時間枠：At birth
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Time from birth to arrival in intensive care and frequency of delay under 60 minutes
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At birth
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Prognosis
時間枠：At birth
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Prognosis based on the TRIPS II score (Transport Risk index of Physiologic Stability, version II, comprising four weighted items: temperature, blood pressure, respiratory support, and response to stimuli).
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At birth
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Intubations
時間枠：At birth
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Frequency of intubations, surfactant administration, and inotropic drugs administration
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At birth
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Cerebral palsy
時間枠：2 years of corrected age
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Frequency of cerebral palsy as reported by paediatrician at 2 years of corrected age
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2 years of corrected age
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Major neurodevelopmental disability
時間枠：2 years of corrected age
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Frequency of the binary composite criteria combining : 1/Survival ; 2/Absence of severe or moderate neuromotor or sensory disability at 2 y.CA defined as cerebral palsy with levels 2 to 5 of the gross motor classification system (GMFCS), blindness, or unilateral or bilateral deafness)
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2 years of corrected age
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Healthcare resource use
時間枠：From birth to the end of follow-up (2 years corrected gestational age), specifically one month after the end of the initial period of hospitalisation, thereafter 6, 12, 18 and 24 months of corrected gestational age.
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Frequency of pediatric consultations (pediatrician or general practitioner); hospitalizations since discharge from neonatal care; emergency room visits without hospitalization; specialized consultations and additional imaging tests. Frequency of non-reimbursed care (psychologist, psychomotor therapist) and use of care facilities (CAMPS, specialized centers) and MDPH procedures (requests for financial assistance, priority cards, or parking permits). |
From birth to the end of follow-up (2 years corrected gestational age), specifically one month after the end of the initial period of hospitalisation, thereafter 6, 12, 18 and 24 months of corrected gestational age.
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Parental experience 1
時間枠：One month after discharge
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Average score of parental experience measured by a 0-10 numeric scale (10 indicating best experience).
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One month after discharge
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Parental experience 2
時間枠：One month after discharge
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Frequency of acute and post-traumatic stress measured by the IES-R scale with normal score <24, moderate risk between 24-32 and severe risk if≥ 33
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One month after discharge
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Parents' mental health 1
時間枠：One month after hospital discharge and at 6, 12, 18, and 24 months of corrected age
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EPDS score > 12 between 0-12 months of infants indicating high risk of postpartum depression
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One month after hospital discharge and at 6, 12, 18, and 24 months of corrected age
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Parent's mental health 2
時間枠：One month after hospital discharge and at 6, 12, 18 and 24 months of corrected age
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PHQ-9 score ≥ 10 over 12 months postpartum indicating moderate to severe depression in adults
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One month after hospital discharge and at 6, 12, 18 and 24 months of corrected age
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Parents' quality of life
時間枠：One month after hospital discharge and at 6, 12, 18, and 24 months of corrected age.
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Quality of life measured by WHOQOL-Bref questionnaire.
Average scoreof each sub scale will be used for comparisons
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One month after hospital discharge and at 6, 12, 18, and 24 months of corrected age.
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Cost-effectiveness 1
時間枠：From the first enrollment to the end of follow-up for the last enrolled child (4 years and 4 months).
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Incremental cost-utility ratio in terms of cost per QALY gained (for parents)
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From the first enrollment to the end of follow-up for the last enrolled child (4 years and 4 months).
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Cost effectiveness 2
時間枠：From the first enrollment to the end of follow-up for the last enrolled child (4 years and 4 months)
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Incremental cost-effectiveness ratio in terms of cost per life year gained (for infants)
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From the first enrollment to the end of follow-up for the last enrolled child (4 years and 4 months)
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Economic impact 1
時間枠：5 years after hypothetical generalization
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The economic impact assessed by estimating the costs and health gains (deaths/sequelae avoided) associated with generalising NNT antenatal positionning
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5 years after hypothetical generalization
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Economic impact 2
時間枠：5 years after hypothetical generalization
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The economic impact assessed by estimating the health gains (deaths/sequelae avoided) associated with generalising NNT antenatal positioning
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5 years after hypothetical generalization
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Social inequalities
時間枠：From inclusion up to 5 months after birth
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All outcomes (except economic outcomes) cross-analyzed with parental social factors (age, level of education, family composition, employment status, financial comfort, socio-professional category, country of birth, language spoken at home, social security and supplementary health insurance coverage) will be studied
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From inclusion up to 5 months after birth
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Regional inequalities
時間枠：From inclusion up to 5 months after birth
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All outcomes (except economic outcomes) cross-analyzed with parental spatial factors (department of residence, APL, distance from home to place of delivery, distance from home to level 3 maternity unit) will be studied
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From inclusion up to 5 months after birth
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NNT local organization
時間枠：From the first enrollment to the end of follow-up for the last enrolled child (4 years and 4 months).
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Analysis of transcription to identify obstacles and drivers in the local organization of care for premature infants.
Description of the characteristics of the professionals participating in the qualitative study and of each participating NNT
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From the first enrollment to the end of follow-up for the last enrolled child (4 years and 4 months).
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協力者と研究者
捜査官
- 主任研究者：Peter JONES, MB BChir PhD、SAMU du Val de l'Oise
研究記録日
主要日程の研究
研究開始 (推定)
一次修了 (推定)
研究の完了 (推定)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
その他の研究ID番号
- APHP251257
- PREPS-24-0182 (その他の助成金/資金番号：French Ministry of Health)
- 2025-A02162-47 (その他の識別子：ID-RCB)
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