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Vergote S, De Bie FR, Duffy JMN, Bosteels J, Benachi A, Power B, Meijer F, Hedrick HL, Fernandes CJ, Reiss IKM, De Coppi P, Lally KP, Deprest JA. Core outcome set for perinatal interventions for congenital diaphragmatic hernia. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2023; 62:374-382. [PMID: 37099763 DOI: 10.1002/uog.26235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 04/06/2023] [Accepted: 04/12/2023] [Indexed: 06/19/2023]
Abstract
OBJECTIVE To develop a core set of prenatal and neonatal outcomes for clinical studies evaluating perinatal interventions for congenital diaphragmatic hernia, using a validated consensus-building method. METHODS An international steering group comprising 13 leading maternal-fetal medicine specialists, neonatologists, pediatric surgeons, patient representatives, researchers and methodologists guided the development of this core outcome set. Potential outcomes were collected through a systematic review of the literature and entered into a two-round online Delphi survey. A call was made for stakeholders with experience of congenital diaphragmatic hernia to review the list and score outcomes based on their perceived relevance. Outcomes that fulfilled the consensus criteria defined a priori were discussed subsequently in online breakout meetings. Results were reviewed in a consensus meeting, during which the core outcome set was defined. Finally, the definitions, measurement methods and aspirational outcomes were defined in online and in-person definition meetings by a selection of 45 stakeholders. RESULTS Overall, 221 stakeholders participated in the Delphi survey and 198 completed both rounds. Fifty outcomes met the consensus criteria and were discussed and rescored by 78 stakeholders in the breakout meetings. During the consensus meeting, 93 stakeholders agreed eventually on eight outcomes, which constituted the core outcome set. Maternal and obstetric outcomes included maternal morbidity related to the intervention and gestational age at delivery. Fetal outcomes included intrauterine demise, interval between intervention and delivery and change in lung size in utero around the time of the intervention. Neonatal outcomes included neonatal mortality, pulmonary hypertension and use of extracorporeal membrane oxygenation. Definitions and measurement methods were formulated by 45 stakeholders, who also added three aspirational outcomes: duration of invasive ventilation, duration of oxygen supplementation and use of pulmonary vasodilators at discharge. CONCLUSIONS We developed with relevant stakeholders a core outcome set for studies evaluating perinatal interventions in congenital diaphragmatic hernia. Its implementation should facilitate the comparison and combination of trial results, enabling future research to better guide clinical practice. © 2023 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- S Vergote
- Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
| | - F R De Bie
- Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
| | - J M N Duffy
- Department of Women and Children's Health, King's College London, London, UK
| | - J Bosteels
- Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
| | - A Benachi
- Service de Gynécologie-Obstétrique, Hôpital Antoine-Béclère, AP-HP, Clamart, France
- Centre de Référence Maladies Rares Hernie de Coupole Diaphragmatique, Hôpital Antoine-Béclère, AP-HP, Clamart, France
| | - B Power
- The Congenital Diaphragmatic Hernia Charity (CDH UK), King's Lynn, UK
| | - F Meijer
- PlatformCHD, Arnhem, The Netherlands
| | - H L Hedrick
- Department of Surgery, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - C J Fernandes
- Division of Neonatology, Department of Pediatrics, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - I K M Reiss
- Department of Pediatrics, Division of Neonatology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - P De Coppi
- Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
- Department of Specialist Neonatal and Pediatric Surgery, Great Ormond Street Hospital for Children, London, UK
- Stem Cells and Regenerative Medicine Section, Institute of Child Health, University College London, London, UK
| | - K P Lally
- Department of Pediatric Surgery, McGovern Medical School at UTHealth Houston, Children's Memorial Hermann Hospital, Houston, TX, USA
| | - J A Deprest
- Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
- Department of Women and Children's Health, King's College London, London, UK
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Demetri A, Davies A, Bakhbakhi D, Ijaz S, Dawson S, McGuinness S, Beasor G, Clayton G, Johnson A, de Souza C, Dempsey A, Snook G, Sharp A, Lissauer D, McGoldrick E, Burden C, Merriel A. Vaginal birth core information set: study protocol for a Delphi study to achieve a consensus on a 'core information set' for vaginal birth. BMJ Open 2023; 13:e070215. [PMID: 37550021 PMCID: PMC10407363 DOI: 10.1136/bmjopen-2022-070215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 05/05/2023] [Indexed: 08/09/2023] Open
Abstract
INTRODUCTION Studies have shown that women are often underinformed about potential benefits and risks of vaginal birth. This is in contrast to other modes of birth, such as caesarean birth, for which the risks/benefits are often conveyed prior to undergoing the procedure. A core information set (CIS) is an agreed set of information points that should be discussed with all patients prior to undergoing a procedure or intervention. This CIS could improve the quality of information given regarding mode of birth options, as women will be given information prioritised by patients and stakeholders regarding vaginal birth, empowering them to make informed decisions about their birth. We aim to describe the protocol for the development of this vaginal birth CIS. METHODS AND ANALYSIS We will develop the CIS by: (1) Compiling a 'long-list' of information points about vaginal birth by: undertaking a scoping review of studies and patient information leaflets; interviews with antenatal/postnatal women, an online survey of stakeholders. (2) Collating the 'long-list' of information points and developing the Delphi survey. Think-aloud interviews will refine the survey. (3) Conducting a two-round Delphi survey. 200 stakeholder participants will be recruited. Items rated critically important by ≥80% of participants in one stakeholder group, or with no consensus, will be carried through to a stakeholder consensus meeting to decide the final CIS. Planned start date is 1 June 2022. Planned end date is 31 August 2023. ETHICS AND DISSEMINATION This project has been given a favourable ethics opinion by the University of Bristol Research Ethics Committee (Ref: 10530). Approval from the ethics committee will be sought for any protocol amendments, and the principal investigator will be responsible for these changes. Findings will be presented at relevant conferences and published in a high-impact journal. We will disseminate the CIS, via Policy Bristol, to clinical policy and guideline developers.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Aine Dempsey
- University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, UK
| | | | - Andrew Sharp
- Centre for Women's Health Research, Department of Women's and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
- Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | - David Lissauer
- Centre for Women's Health Research, Department of Women's and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | | | | | - Abi Merriel
- University of Bristol, Bristol, UK
- Centre for Women's Health Research, Department of Women's and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
- Liverpool Women's NHS Foundation Trust, Liverpool, UK
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3
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Bakhbakhi D, Siassakos D, Davies A, Merriel A, Barnard K, Stead E, Shakespeare C, Duffy JMN, Hinton L, McDowell K, Lyons A, Fraser A, Burden C. Interventions, outcomes and outcome measurement instruments in stillbirth care research: A systematic review to inform the development of a core outcome set. BJOG 2023; 130:560-576. [PMID: 36655361 DOI: 10.1111/1471-0528.17390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 10/08/2022] [Accepted: 10/26/2022] [Indexed: 01/20/2023]
Abstract
BACKGROUND A core outcome set could address inconsistent outcome reporting and improve evidence for stillbirth care research, which have been identified as an important research priority. OBJECTIVES To identify outcomes and outcome measurement instruments reported by studies evaluating interventions after the diagnosis of a stillbirth. SEARCH STRATEGY Amed, BNI, CINAHL, ClinicalTrials.gov, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Embase, MEDLINE, PsycINFO, and WHO ICTRP from 1998 to August 2021. SELECTION CRITERIA Randomised and non-randomised comparative or non-comparative studies reporting a stillbirth care intervention. DATA COLLECTION AND ANALYSIS Interventions, outcomes reported, definitions and outcome measurement tools were extracted. MAIN RESULTS Forty randomised and 200 non-randomised studies were included. Fifty-eight different interventions were reported, labour and birth care (52 studies), hospital bereavement care (28 studies), clinical investigations (116 studies), care in a multiple pregnancy (2 studies), psychosocial support (28 studies) and care in a subsequent pregnancy (14 studies). A total of 391 unique outcomes were reported and organised into 14 outcome domains: labour and birth; postpartum; delivery of care; investigations; multiple pregnancy; mental health; emotional functioning; grief and bereavement; social functioning; relationship; whole person; subsequent pregnancy; subsequent children and siblings and economic. A total of 242 outcome measurement instruments were used, with 0-22 tools per outcome. CONCLUSIONS Heterogeneity in outcome reporting, outcome definition and measurement tools in care after stillbirth exists. Considerable research gaps on specific intervention types in stillbirth care were identified. A core outcome set is needed to standardise outcome collection and reporting for stillbirth care research.
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Affiliation(s)
| | | | - Anna Davies
- Centre for Academic Child Health, University of Bristol, Bristol, UK
| | | | | | - Emma Stead
- Liverpool University Hospitals Foundation Trust, Liverpool, UK
| | | | | | - Lisa Hinton
- THIS Institute, University of Cambridge, Cambridge, UK
| | | | - Anna Lyons
- Northern General Hospital, Sheffield, UK
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4
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Bakhbakhi D, Fraser A, Siasakos D, Hinton L, Davies A, Merriel A, Duffy JMN, Redshaw M, Lynch M, Timlin L, Flenady V, Heazell AE, Downe S, Slade P, Brookes S, Wojcieszek A, Murphy M, de Oliveira Salgado H, Pollock D, Aggarwal N, Attachie I, Leisher S, Kihusa W, Mulley K, Wimmer L, Burden C. Protocol for the development of a core outcome set for stillbirth care research (iCHOOSE Study). BMJ Open 2022; 12:e056629. [PMID: 35140161 PMCID: PMC8830254 DOI: 10.1136/bmjopen-2021-056629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Stillbirth is associated with significant physical, psychosocial and economic consequences for parents, families, wider society and the healthcare system. There is emerging momentum to design and evaluate interventions for care after stillbirth and in subsequent pregnancies. However, there is insufficient evidence to inform clinical practice compounded by inconsistent outcome reporting in research studies. To address this paucity of evidence, we plan to develop a core outcome set for stillbirth care research, through an international consensus process with key stakeholders including parents, healthcare professionals and researchers. METHODS AND ANALYSIS The development of this core outcome set will be divided into five distinct phases: (1) Identifying potential outcomes from a mixed-methods systematic review and analysis of interviews with parents who have experienced stillbirth; (2) Creating a comprehensive outcome long-list and piloting of a Delphi questionnaire using think-aloud interviews; (3) Choosing the most important outcomes by conducting an international two-round Delphi survey including high-income, middle-income and low-income countries; (4) Deciding the core outcome set by consensus meetings with key stakeholders and (5) Dissemination and promotion of the core outcome set. A parent and public involvement panel and international steering committee has been convened to coproduce every stage of the development of this core outcome set. ETHICS AND DISSEMINATION Ethical approval for the qualitative interviews has been approved by Berkshire Ethics Committee REC Reference 12/SC/0495. Ethical approval for the think-aloud interviews, Delphi survey and consensus meetings has been awarded from the University of Bristol Faculty of Health Sciences Research Ethics Committee (Reference number: 116535). The dissemination strategy is being developed with the parent and public involvement panel and steering committee. Results will be published in peer-reviewed specialty journals, shared at national and international conferences and promoted through parent organisations and charities. PROSPERO REGISTRATION NUMBER CRD42018087748.
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Affiliation(s)
- Danya Bakhbakhi
- Translational Health Sciences, University of Bristol Medical School, Bristol, UK
| | - Abigail Fraser
- Population Health Sciences, University of Bristol Medical School, Bristol, UK
| | | | - Lisa Hinton
- The Healthcare Improvement Studies Institute, University of Cambridge, Cambridge, UK
| | - Anna Davies
- Centre for Academic Child Health, University of Bristol, Bristol, UK
| | - Abi Merriel
- Population Health Sciences, University of Bristol Medical School, Bristol, UK
| | - James M N Duffy
- Obstetrics and Gynaecology Department, North Middlesex University Hospital NHS Trust, London, UK
| | | | - Mary Lynch
- Faculty of Health Sciences, University of Bristol, Bristol, UK
| | - Laura Timlin
- Women & Children's Health Department, North Bristol NHS Trust, Bristol, UK
| | - Vicki Flenady
- Centre of Research Excellence in Stillbirth, Mater Research Institute-University of Queensland, Brisbane, Queensland, Australia
| | | | - Soo Downe
- Research in Childbirth and Health, University of Central Lancashire, Preston, UK
| | - Pauline Slade
- Psychological Sciences, University of Liverpool, Liverpool, UK
| | - Sara Brookes
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, UK
| | - Aleena Wojcieszek
- Centre of Research Excellence in Stillbirth, Mater Research Institute-University of Queensland, Brisbane, Queensland, Australia
| | - Margaret Murphy
- Nursing and Midwifery, University College Cork National University of Ireland, Cork, Ireland
| | | | - Danielle Pollock
- Public Health, The University of Adelaide, Adelaide, South Australia, Australia
| | - Neelam Aggarwal
- Department of Obstetrics and Gynaecology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Irene Attachie
- Department of Nursing and Midwifery, University of Health and Allied Sciences School of Public Health, Hohoe, Ghana
| | | | | | | | | | - Christy Burden
- Translational Health Sciences, University of Bristol Medical School, Bristol, UK
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5
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Townsend R, Khalil A. Outstanding clinical and research questions in complex twin and multiple pregnancy. Prenat Diagn 2021; 41:1482-1485. [PMID: 34750845 DOI: 10.1002/pd.6067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Rosemary Townsend
- Molecular, Genetic and Population Health Sciences, Usher Institute, Edinburgh Medical School, University of Edinburgh, Edinburgh, UK.,Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - Asma Khalil
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK.,Fetal Medicine Unit, Department of Obstetrics and Gynaecology, St. George's University Hospitals NHS Foundation Trust, London, UK.,Twins Trust Centre for Research and Clinical Excellence, St. George's University Hospitals NHS Foundation Trust, London, UK
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Khalil A, Townsend R, Reed K, Lopriore E. Call to action: long-term neurodevelopment in monochorionic twins. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 58:5-10. [PMID: 33438253 DOI: 10.1002/uog.23591] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/26/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Affiliation(s)
- A Khalil
- TwinsTrust Centre for Research and Clinical Excellence, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
| | - R Townsend
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
| | - K Reed
- Twins Trust, Aldershot, UK
| | - E Lopriore
- Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Centre, Leiden, The Netherlands
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7
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Khalil A, Liu B. Controversies in the management of twin pregnancy. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2021; 57:888-902. [PMID: 32799348 DOI: 10.1002/uog.22181] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/18/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Despite many advances in antenatal care, twin pregnancies still experience more adverse outcomes, in particular perinatal morbidity and mortality. They also pose a multitude of challenges and controversies, as outlined in this Review. Moreover, they are less likely to be included in clinical trials. Many issues on classification and management remain under debate. Efforts at standardizing diagnostic criteria, monitoring protocols, management and outcome reporting are likely to reduce their perinatal risks. The top 10 most important research uncertainties related to multiple pregnancies have been identified by both clinicians and patients. More robust research in the form of randomized trials and large well-conducted prospective cohort studies is needed to address these controversies. © 2020 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- A Khalil
- Twins Trust Centre for Research and Clinical Excellence, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
| | - B Liu
- Twins Trust Centre for Research and Clinical Excellence, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
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8
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Duffy JMN, AlAhwany H, Bhattacharya S, Collura B, Curtis C, Evers JLH, Farquharson RG, Franik S, Giudice LC, Khalaf Y, Knijnenburg JML, Leeners B, Legro RS, Lensen S, Vazquez-Niebla JC, Mavrelos D, Mol BWJ, Niederberger C, Ng EHY, Otter AS, Puscasiu L, Rautakallio-Hokkanen S, Repping S, Sarris I, Simpson JL, Strandell A, Strawbridge C, Torrance HL, Vail A, van Wely M, Vercoe MA, Vuong NL, Wang AY, Wang R, Wilkinson J, Youssef MA, Farquhar CM. Developing a core outcome set for future infertility research: an international consensus development study† ‡. Hum Reprod 2021; 35:2725-2734. [PMID: 33252685 PMCID: PMC7744160 DOI: 10.1093/humrep/deaa241] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/08/2020] [Indexed: 02/07/2023] Open
Abstract
STUDY QUESTION Can a core outcome set to standardize outcome selection, collection and reporting across future infertility research be developed? SUMMARY ANSWER A minimum data set, known as a core outcome set, has been developed for randomized controlled trials (RCTs) and systematic reviews evaluating potential treatments for infertility. WHAT IS KNOWN ALREADY Complex issues, including a failure to consider the perspectives of people with fertility problems when selecting outcomes, variations in outcome definitions and the selective reporting of outcomes on the basis of statistical analysis, make the results of infertility research difficult to interpret. STUDY DESIGN, SIZE, DURATION A three-round Delphi survey (372 participants from 41 countries) and consensus development workshop (30 participants from 27 countries). PARTICIPANTS/MATERIALS, SETTING, METHODS Healthcare professionals, researchers and people with fertility problems were brought together in an open and transparent process using formal consensus science methods. MAIN RESULTS AND THE ROLE OF CHANCE The core outcome set consists of: viable intrauterine pregnancy confirmed by ultrasound (accounting for singleton, twin and higher multiple pregnancy); pregnancy loss (accounting for ectopic pregnancy, miscarriage, stillbirth and termination of pregnancy); live birth; gestational age at delivery; birthweight; neonatal mortality; and major congenital anomaly. Time to pregnancy leading to live birth should be reported when applicable. LIMITATIONS, REASONS FOR CAUTION We used consensus development methods which have inherent limitations, including the representativeness of the participant sample, Delphi survey attrition and an arbitrary consensus threshold. WIDER IMPLICATIONS OF THE FINDINGS Embedding the core outcome set within RCTs and systematic reviews should ensure the comprehensive selection, collection and reporting of core outcomes. Research funding bodies, the Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) statement, and over 80 specialty journals, including the Cochrane Gynaecology and Fertility Group, Fertility and Sterility and Human Reproduction, have committed to implementing this core outcome set. STUDY FUNDING/COMPETING INTEREST(S) This research was funded by the Catalyst Fund, Royal Society of New Zealand, Auckland Medical Research Fund and Maurice and Phyllis Paykel Trust. The funder had no role in the design and conduct of the study, the collection, management, analysis or interpretation of data, or manuscript preparation. B.W.J.M. is supported by a National Health and Medical Research Council Practitioner Fellowship (GNT1082548). S.B. was supported by University of Auckland Foundation Seelye Travelling Fellowship. S.B. reports being the Editor-in-Chief of Human Reproduction Open and an editor of the Cochrane Gynaecology and Fertility group. J.L.H.E. reports being the Editor Emeritus of Human Reproduction. J.M.L.K. reports research sponsorship from Ferring and Theramex. R.S.L. reports consultancy fees from Abbvie, Bayer, Ferring, Fractyl, Insud Pharma and Kindex and research sponsorship from Guerbet and Hass Avocado Board. B.W.J.M. reports consultancy fees from Guerbet, iGenomix, Merck, Merck KGaA and ObsEva. C.N. reports being the Co Editor-in-Chief of Fertility and Sterility and Section Editor of the Journal of Urology, research sponsorship from Ferring, and retains a financial interest in NexHand. A.S. reports consultancy fees from Guerbet. E.H.Y.N. reports research sponsorship from Merck. N.L.V. reports consultancy and conference fees from Ferring, Merck and Merck Sharp and Dohme. The remaining authors declare no competing interests in relation to the work presented. All authors have completed the disclosure form. TRIAL REGISTRATION NUMBER Core Outcome Measures in Effectiveness Trials Initiative: 1023.
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Affiliation(s)
- J M N Duffy
- King's Fertility, Fetal Medicine Research Institute, London, UK.,Institute for Women's Health, University College London, London, UK
| | - H AlAhwany
- School of Medicine, University of Nottingham, Derby, UK
| | - S Bhattacharya
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, UK
| | - B Collura
- RESOLVE: The National Infertility Association, VA, USA
| | - C Curtis
- Fertility New Zealand, Auckland, New Zealand.,School of Psychology, University of Waikato, Hamilton, New Zealand
| | - J L H Evers
- Maastricht University Medical Centre, Maastricht, The Netherlands
| | - R G Farquharson
- Department of Obstetrics and Gynaecology, Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | - S Franik
- Department of Obstetrics and Gynaecology, Münster University Hospital, Münster, Germany
| | - L C Giudice
- Center for Research, Innovation and Training in Reproduction and Infertility, Center for Reproductive Sciences, University of California, San Francisco, CA, USA.,International Federation of Fertility Societies, Philadelphia, PA, USA
| | - Y Khalaf
- Department of Women and Children's Health, King's College London, Guy's Hospital, London, UK
| | | | - B Leeners
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland
| | - R S Legro
- Department of Obstetrics and Gynaecology, Penn State College of Medicine, PA, USA
| | - S Lensen
- Department of Obstetrics and Gynaecology, University of Melbourne, VIC, Australia
| | - J C Vazquez-Niebla
- Cochrane Iberoamerica, Biomedical Research Institute Sant Pau, Barcelona, Spain
| | - D Mavrelos
- Reproductive Medicine Unit, University College Hospital, London, UK
| | - B W J Mol
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - C Niederberger
- Department of Urology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - E H Y Ng
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong.,Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, China
| | - A S Otter
- Osakidetza OSI, Bilbao, Basurto, Spain
| | - L Puscasiu
- University of Medicine, Pharmacy, Sciences and Technology, Targu Mures, Romania
| | | | - S Repping
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - I Sarris
- King's Fertility, Fetal Medicine Research Institute, London, UK
| | - J L Simpson
- Department of Human and Molecular Genetics, Florida International University, FL, USA
| | - A Strandell
- Department of Obstetrics and Gynecology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | | | - H L Torrance
- Department of Reproductive Medicine, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - A Vail
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - M van Wely
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - M A Vercoe
- Cochrane Gynaecology and Fertility Group, University of Auckland, Auckland, New Zealand
| | - N L Vuong
- Department of Obstetrics and Gynaecology, University of Medicine and Pharmacy in Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - A Y Wang
- Faculty of Health, University of Technology, Sydney, Broadway, Australia
| | - R Wang
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - J Wilkinson
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - M A Youssef
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - C M Farquhar
- Cochrane Gynaecology and Fertility Group, University of Auckland, Auckland, New Zealand
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Abstract
Twin to twin transfusion syndrome (TTTS) is a common complication that typically presents in the second trimester of pregnancy in 10-15% of monochorionic twins due to net transfer of volume and hormonal substances from one twin to the other across vascular anastomoses on the placenta. Without recognition and treatment, TTTS is the greatest contributor to fetal loss prior to viability in 90-100% of advanced cases. Ultrasound diagnosis of monochorionicity is most reliable in the first trimester and sets the monitoring strategy for this type of twins. The diagnosis of TTTS is made by ultrasound with the findings of polyhydramnios due to volume overload and polyuria in one twin and oligohydramnios due to oliguria of the co-twin. Assessment of bladder filling as well as arterial and venous Doppler patterns are required for staging disease severity. Assessment of fetal cardiac function also provides additional insight into the fetal cardiovascular impacts of the disease as well as help identify fetuses that may require postnatal follow up. Fetoscopic laser ablation of the communicating vascular anastomoses between the twins is the standard treatment for TTTS. It aims to cure the condition by interrupting the link between their circulations and making them independent of one another. Contemporary outcome data after laser surgery suggests survival for both fetuses can be anticipated in up to 65% of cases and survival of a single fetus in up to 88% of cases. However, preterm birth remains a significant contributor to postnatal morbidity and mortality. Long term outcomes of TTTS survivors indicate that up to 11% of children may show signs of neurologic impairment. Strategies to minimize preterm birth after treatment and standardized reporting by laser centers are important considerations to improve overall outcomes and understand the long-term impacts of TTTS.
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Affiliation(s)
- Jena L Miller
- The Johns Hopkins Center for Fetal Therapy, Department of Gynecology and Obstetrics, Johns Hopkins University, Baltimore, MD, USA
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Sileo FG, D'antonio F, Benlioglu C, Bhide A, Khalil A. Perinatal outcomes of twin pregnancies complicated by late twin-twin transfusion syndrome: A systematic review and meta-analysis. Acta Obstet Gynecol Scand 2021; 100:832-842. [PMID: 33337543 DOI: 10.1111/aogs.14066] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 12/09/2020] [Accepted: 12/13/2020] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Untreated twin-to-twin transfusion syndrome (TTTS) is associated with a high risk of perinatal mortality and morbidity. Laser surgery is recommended before 26 weeks of gestation. However, the optimal management in case of late TTTS (occurring after 26 weeks of gestation) is yet to be established. MATERIAL AND METHODS We conducted a systematic review and meta-analysis to evaluate the outcomes of monochorionic-diamniotic twin pregnancies complicated by late TTTS according to different management options (expectant, laser therapy, amnioreduction, or delivery). The primary outcome was mortality, including single and double intrauterine, neonatal, and perinatal death. Secondary outcomes were composite morbidity, neuromorbidity, respiratory distress syndrome, admission to neonatal intensive care unit, intact survival (ie, free from neurological complications), and preterm birth before <32 weeks of gestation. Outcomes were reviewed according to the management and reported for the overall population of twins and disease status (ie, donor and recipient separately). Random-effect meta-analyses of proportions were used to analyze the data. RESULTS Nine studies including 796 twin pregnancies affected by TTTS were included. No randomized controlled trials were available for inclusion. TTTS occurred at ≥26 weeks of gestation in 8.7% (95% CI 6.9%-10.9%; 67/769) of cases reporting TTTS at all gestations. Intrauterine death occurred in 17.7% (95% CI 4.9%-36.2%) of pregnancies managed expectantly, 5.3% (95% CI 0.9%-12.9%) of pregnancies treated with laser, and 0% (95% CI 0%-9%) after amnioreduction. Neonatal death occurred in 42.5% (95% CI 17.5%-69.7%) of pregnancies managed expectantly, in 2.8% (95% CI 0.3%-7.7%) of cases treated with laser, and in 20.2% (95% CI 6%-40%) after amnioreduction. Only one study (10 cases) reported data on immediate delivery after diagnosis with no perinatal deaths. Perinatal death incidence was 55.7% (95% CI 31.4%-78.6%) in twin pregnancies managed expectantly, 5.6% (95% CI 0.5%-15.3%) in those treated with laser, and 20.2% (95% CI 6%-40%) in those after amnioreduction. Intact survival was reported in 44.4%, 96.4%, and 78% of fetuses managed expectantly, with laser or amnioreduction, respectively. CONCLUSIONS Evidence regarding perinatal mortality and morbidity in twin pregnancies complicated by late TTTS according to the different managements was of very low quality. Therefore further high-quality research in this field is needed to elucidate the optimal management of these pregnancies.
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Affiliation(s)
- Filomena Giulia Sileo
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK.,Department of Biomedical, Metabolic and Neural Sciences, International Doctorate School in Clinical and Experimental Medicine, University of Modena and Reggio Emilia, Modena, Italy.,Unit of Obstetrics and Gynecology, Azienda Unità Sanitaria Locale - IRCCS, Reggio Emilia, Italy
| | - Francesco D'antonio
- Prenatal Medicine Unit, Obstetrics and Gynecology Unit, University "G. d'Annunzio" of Chieti, Chieti, Italy
| | - Can Benlioglu
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK
| | - Amar Bhide
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK
| | - Asma Khalil
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK.,Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK.,Twins Trust Centre for Research and Clinical Excellence, St George's Hospital, London, UK
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11
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Duffy JMN, AlAhwany H, Bhattacharya S, Collura B, Curtis C, Evers JLH, Farquharson RG, Franik S, Giudice LC, Khalaf Y, Knijnenburg JML, Leeners B, Legro RS, Lensen S, Vazquez-Niebla JC, Mavrelos D, Mol BWJ, Niederberger C, Ng EHY, Otter AS, Puscasiu L, Rautakallio-Hokkanen S, Repping S, Sarris I, Simpson JL, Strandell A, Strawbridge C, Torrance HL, Vail A, van Wely M, Vercoe MA, Vuong NL, Wang AY, Wang R, Wilkinson J, Youssef MA, Farquhar CM. Developing a core outcome set for future infertility research: an international consensus development study. Fertil Steril 2020; 115:191-200. [PMID: 33272618 DOI: 10.1016/j.fertnstert.2020.11.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/08/2020] [Accepted: 07/22/2020] [Indexed: 12/26/2022]
Abstract
STUDY QUESTION Can a core outcome set to standardize outcome selection, collection, and reporting across future infertility research be developed? SUMMARY ANSWER A minimum data set, known as a core outcome set, has been developed for randomized controlled trials (RCT) and systematic reviews evaluating potential treatments for infertility. WHAT IS KNOWN ALREADY Complex issues, including a failure to consider the perspectives of people with fertility problems when selecting outcomes, variations in outcome definitions, and the selective reporting of outcomes on the basis of statistical analysis, make the results of infertility research difficult to interpret. STUDY DESIGN, SIZE, DURATION A three-round Delphi survey (372 participants from 41 countries) and consensus development workshop (30 participants from 27 countries). PARTICIPANTS/MATERIALS, SETTING, METHODS Healthcare professionals, researchers, and people with fertility problems were brought together in an open and transparent process using formal consensus science methods. MAIN RESULTS AND THE ROLE OF CHANCE The core outcome set consists of: viable intrauterine pregnancy confirmed by ultrasound (accounting for singleton, twin, and higher multiple pregnancy); pregnancy loss (accounting for ectopic pregnancy, miscarriage, stillbirth, and termination of pregnancy); live birth; gestational age at delivery; birthweight; neonatal mortality; and major congenital anomaly. Time to pregnancy leading to live birth should be reported when applicable. LIMITATIONS, REASONS FOR CAUTION We used consensus development methods which have inherent limitations, including the representativeness of the participant sample, Delphi survey attrition, and an arbitrary consensus threshold. WIDER IMPLICATIONS OF THE FINDINGS Embedding the core outcome set within RCTs and systematic reviews should ensure the comprehensive selection, collection, and reporting of core outcomes. Research funding bodies, the Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) statement, and over 80 specialty journals, including the Cochrane Gynaecology and Fertility Group, Ferility and Sterility, and Human Reproduction, have committed to implementing this core outcome set. STUDY FUNDING/COMPETING INTEREST(S) This research was funded by the Catalyst Fund, Royal Society of New Zealand, Auckland Medical Research Fund, and Maurice and Phyllis Paykel Trust. Siladitya Bhattacharya reports being the Editor-in-Chief of Human Reproduction Open and an editor of the Cochrane Gynaecology and Fertility group. Hans Evers reports being the Editor Emeritus of Human Reproduction. José Knijnenburg reports research sponsorship from Ferring and Theramex. Richard Legro reports consultancy fees from Abbvie, Bayer, Ferring, Fractyl, Insud Pharma and Kindex and research sponsorship from Guerbet and Hass Avocado Board. Ben Mol reports consultancy fees from Guerbet, iGenomix, Merck, Merck KGaA and ObsEva. Craig Niederberger reports being the Co Editor-in-Chief of Fertility and Sterility and Section Editor of the Journal of Urology, research sponsorship from Ferring, and retains a financial interest in NexHand. Annika Strandell reports consultancy fees from Guerbet. Ernest Ng reports research sponsorship from Merck. Lan Vuong reports consultancy and conference fees from Ferring, Merck and Merck Sharp and Dohme. The remaining authors declare no competing interests in relation to the work presented. All authors have completed the disclosure form. TRIAL REGISTRATION NUMBER Core Outcome Measures in Effectiveness Trials Initiative: 1023.
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Affiliation(s)
- J M N Duffy
- King's Fertility, Fetal Medicine Research Institute, London, UK; Institute for Women's Health, University College London, London, UK.
| | - H AlAhwany
- School of Medicine, University of Nottingham, Derby, UK
| | - S Bhattacharya
- School of Medicine, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, UK
| | - B Collura
- RESOLVE: The National Infertility Association, Virginia, United States
| | - C Curtis
- Fertility New Zealand, Auckland, New Zealand; School of Psychology, University of Waikato, Hamilton, New Zealand
| | - J L H Evers
- Maastricht University Medical Centre, Maastricht, The Netherlands
| | - R G Farquharson
- Department of Obstetrics and Gynaecology, Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | - S Franik
- Department of Obstetrics and Gynaecology, Münster University Hospital, Münster, Germany
| | - L C Giudice
- Center for Research, Innovation and Training in Reproduction and Infertility, Center for Reproductive Sciences, University of California, San Francisco, California, United States; International Federation of Fertility Societies, Philadelphia, Pennsylvania, United States
| | - Y Khalaf
- Department of Women and Children's Health, King's College London, Guy's Hospital, London
| | | | - B Leeners
- Department of Reproductive Endocrinology, University Hospital Zurich, Zurich, Switzerland
| | - R S Legro
- Department of Obstetrics and Gynaecology, Penn State College of Medicine, Pennsylvania
| | - S Lensen
- Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | - J C Vazquez-Niebla
- Cochrane Iberoamerica, Biomedical Research Institute Sant Pau, Barcelona, Spain
| | - D Mavrelos
- Reproductive Medicine Unit, University College Hospital, London, UK
| | - B W J Mol
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - C Niederberger
- Department of Urology, University of Illinois at Chicago College of Medicine, Chicago, Illinois
| | - E H Y Ng
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong; Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, China
| | - A S Otter
- Osakidetza OSI, Bilbao, Basurto, Spain
| | - L Puscasiu
- University of Medicine, Pharmacy, Sciences and Technology, Targu Mures, Romania
| | | | - S Repping
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - I Sarris
- King's Fertility, Fetal Medicine Research Institute, London, UK
| | - J L Simpson
- Department of Human and Molecular Genetics, Florida International University, Florida, United States
| | - A Strandell
- Department of Obstetrics and Gynecology, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | | | - H L Torrance
- Department of Reproductive Medicine, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - A Vail
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - M van Wely
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - M A Vercoe
- Cochrane Gynaecology and Fertility Group, University of Auckland, Auckland, New Zealand
| | - N L Vuong
- Department of Obstetrics and Gynaecology, University of Medicine and Pharmacy in Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - A Y Wang
- Faculty of Health, University of Technology, Sydney, Broadway, Australia
| | - R Wang
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - J Wilkinson
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - M A Youssef
- Department of Obstetrics & Gynaecology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - C M Farquhar
- Cochrane Gynaecology and Fertility Group, University of Auckland, Auckland, New Zealand
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12
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Leow HW, Tan EL, Black M. Reported outcomes for planned caesarean section versus planned vaginal delivery: A systematic review. Eur J Obstet Gynecol Reprod Biol 2020; 256:101-108. [PMID: 33197678 DOI: 10.1016/j.ejogrb.2020.10.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 10/16/2020] [Accepted: 10/23/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND There is currently no consensus regarding the outcomes and outcome measures that should be reported in studies assessing planned mode of birth. OBJECTIVE To develop an inventory for reported outcomes for studies comparing planned caesarean section (CS) and planned vaginal delivery (VD) for women age 18-45. METHODS A systematic review of outcomes reported in prospective studies investigating planned CS and planned VD was conducted. Three online databases, Ovid SP version of MEDLINE and EMBASE and the Cochrane Pregnancy and Childbirth Group's Trials Register, were searched from 2011 to June 2019. The inclusion criteria were: prospective studies evaluating planned mode of birth, age 18-45, singleton pregnancy, gestational age 37-40 weeks, >100 participants, middle or high income countries. No language restrictions were applied. Two researchers independently screened titles and abstracts, and subsequently reviewed the full text of each selected study to assess for eligibility. Discrepancies were resolved by discussion with a third author. The selected studies were evaluated using the MOMENT criteria. Outcomes and outcome measures were systematically extracted and organised into an inventory. RESULTS 63 prospective studies comparing planned CS versus planned VD including data from 6,397,310 women were included. 37 studies (59%) investigating planned CS versus planned VD fulfilled four or more MOMENT criteria. In total, 43 different primary outcomes and 79 different primary outcome measures, and 12 different secondary outcomes and 31 secondary outcome measures were identified from studies investigating planned CS versus planned VD. CONCLUSION The findings of this study will contribute to the development of a core outcome set for planned mode of birth in the future. Standardising outcomes will aid comparison and interpretation of data pertaining to planned CS versus planned VD. PROSPERO registration: CRD42019133104.
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Affiliation(s)
- Hui Wei Leow
- University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, United Kingdom.
| | - Elizabeth Lilinn Tan
- University of Aberdeen, Polwarth Building, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
| | - Mairead Black
- University of Aberdeen, Polwarth Building, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
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13
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Duffy J, Cairns AE, Richards-Doran D, van 't Hooft J, Gale C, Brown M, Chappell LC, Grobman WA, Fitzpatrick R, Karumanchi SA, Khalil A, Lucas DN, Magee LA, Mol BW, Stark M, Thangaratinam S, Wilson MJ, von Dadelszen P, Williamson PR, Ziebland S, McManus RJ. A core outcome set for pre-eclampsia research: an international consensus development study. BJOG 2020; 127:1516-1526. [PMID: 32416644 DOI: 10.1111/1471-0528.16319] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2020] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To develop a core outcome set for pre-eclampsia. DESIGN Consensus development study. SETTING International. POPULATION Two hundred and eight-one healthcare professionals, 41 researchers and 110 patients, representing 56 countries, participated. METHODS Modified Delphi method and Modified Nominal Group Technique. RESULTS A long-list of 116 potential core outcomes was developed by combining the outcomes reported in 79 pre-eclampsia trials with those derived from thematic analysis of 30 in-depth interviews of women with lived experience of pre-eclampsia. Forty-seven consensus outcomes were identified from the Delphi process following which 14 maternal and eight offspring core outcomes were agreed at the consensus development meeting. Maternal core outcomes: death, eclampsia, stroke, cortical blindness, retinal detachment, pulmonary oedema, acute kidney injury, liver haematoma or rupture, abruption, postpartum haemorrhage, raised liver enzymes, low platelets, admission to intensive care required, and intubation and ventilation. Offspring core outcomes: stillbirth, gestational age at delivery, birthweight, small-for-gestational-age, neonatal mortality, seizures, admission to neonatal unit required and respiratory support. CONCLUSIONS The core outcome set for pre-eclampsia should underpin future randomised trials and systematic reviews. Such implementation should ensure that future research holds the necessary reach and relevance to inform clinical practice, enhance women's care and improve the outcomes of pregnant women and their babies. TWEETABLE ABSTRACT 281 healthcare professionals, 41 researchers and 110 women have developed #preeclampsia core outcomes @HOPEoutcomes @jamesmnduffy. [Correction added on 29 June 2020, after first online publication: the order has been corrected.].
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Affiliation(s)
- Jmn Duffy
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
- Institute for Women's Health, University College London, London, UK
| | - A E Cairns
- Institute for Women's Health, University College London, London, UK
| | - D Richards-Doran
- Institute for Women's Health, University College London, London, UK
| | - J van 't Hooft
- Department of Obstetrics and Gynaecology, Amsterdam UMC, Academic Medical Centre, Amsterdam, The Netherlands
| | - C Gale
- Academic Neonatal Medicine, Imperial College London, London, UK
| | - M Brown
- Department of Renal Medicine, St George Hospital and University of New South Wales, Kogarah, NSW, Australia
| | - L C Chappell
- Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - W A Grobman
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - R Fitzpatrick
- Health Services Research Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | | | - A Khalil
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - D N Lucas
- London North West University Healthcare NHS Trust, Harrow, UK
| | - L A Magee
- Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - B W Mol
- Department of Obstetrics and Gynaecology, Monash University, Clayton, Vic., Australia
| | - M Stark
- Department of Obstetrics and Gynaecology, University of Adelaide, Adelaide, SA, Australia
| | - S Thangaratinam
- Women's Health Research Unit, Barts and the London School of Medicine and Dentistry, London, UK
| | - M J Wilson
- School of Health and Related Research, University of Sheffield, Sheffield, UK
| | - P von Dadelszen
- Department of Women and Children's Health, School of Life Course Sciences, King's College London, London, UK
| | - P R Williamson
- MRC North West Hub for Trials Methodology Research, Department of Biostatistics, University of Liverpool, Liverpool, UK
| | - S Ziebland
- Institute for Women's Health, University College London, London, UK
| | - R J McManus
- Institute for Women's Health, University College London, London, UK
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14
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D'Antonio F, Benlioglu C, Sileo FG, Thilaganathan B, Papageorghiou A, Bhide A, Khalil A. Perinatal outcomes of twin pregnancies affected by early twin-twin transfusion syndrome: A systematic review and meta-analysis. Acta Obstet Gynecol Scand 2020; 99:1121-1134. [PMID: 32162305 DOI: 10.1111/aogs.13840] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/28/2020] [Accepted: 03/08/2020] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Twin-to-twin transfusion syndrome (TTTS) is associated with a high risk of perinatal mortality and morbidity if not treated. However, the optimal timing and management in case of early (occurring < 18 weeks) TTTS has not been established yet. MATERIAL AND METHODS This is a systematic review and meta-analysis aiming at evaluating the outcomes of monochorionic diamniotic twin pregnancies complicated by early (ie before 18 weeks) TTTS according to different management options (expectant, laser therapy, amnioreduction or cord occlusion). The primary outcome was mortality, including single and double intrauterine, neonatal and perinatal death. Secondary outcomes were: composite morbidity, neuromorbidity, respiratory distress syndrome, admission to neonatal intensive care unit, intact survival (defined as survival free from neurological complications) and preterm birth < 32 weeks of gestation. All outcomes were reviewed according to the different management options (expectant, laser therapy, amnioreduction or cord occlusion) and reported FOR the overall population of twins, and for the donor and recipient separately. Subgroup analysis for TTTS occurring before 16 weeks of gestation was performed. Random-effect meta-analyses of proportions were used to analyse the data. RESULTS Thirteen studies were included. Early TTTS occurred in 14.3% (95% confidence interval [CI] 11.9-17.0) of cases. The incidence of intrauterine death was 19.0% (95% CI 2.6-45.5) in twins managed expectantly, 32.4% (95% CI 16.5-50.7) in those who received laser treatment and 12.5% (95% CI 4.8-23.0) in those treated with amnioreduction. The incidence of neonatal death was 22.6% (95% CI 4.2-49.8) in twins managed expectantly, 24.7% (95% CI 0.5-80.3) in those who received laser and 20.2 (95% CI 5.8-43.4) in those who had amnioreduction; it was not possible to compute the incidence of these outcomes in twins undergoing cord occlusion because of insufficient sample and lack of reporting of most of the observed outcomes. Overall, the incidence of perinatal death was 43.9% (95% CI 5.9-87.7) in twins managed expectantly, 47.3% (95% CI 21.4-70.0) in those treated with laser and 28.5% in those who had amnioreduction. CONCLUSIONS Twin pregnancies affected by early TTTS are at substantial risk of perinatal mortality and morbidity; however, the data come from very small studies with a high risk of selection bias.
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Affiliation(s)
- Francesco D'Antonio
- Department of Obstetrics and Gynecology, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
| | - Can Benlioglu
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK
| | - Filomena G Sileo
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK.,Prenatal Medicine Unit, Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Modena, Italy
| | - Basky Thilaganathan
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK.,Vascular Biology Research Center, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - Aris Papageorghiou
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK
| | - Amarnath Bhide
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK
| | - Asma Khalil
- Fetal Medicine Unit, St George's Hospital, St George's University of London, London, UK.,Vascular Biology Research Center, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
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15
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Townsend R, Duffy JMN, Khalil A. Increasing value and reducing research waste in obstetrics: towards woman-centered research. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2020; 55:151-156. [PMID: 30980569 DOI: 10.1002/uog.20294] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/24/2019] [Accepted: 04/05/2019] [Indexed: 06/09/2023]
Affiliation(s)
- R Townsend
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
| | - J M N Duffy
- Balliol College, University of Oxford, Oxford, UK
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Radcliffe Primary Care Building, Radcliffe Observatory Quarter, Oxford, UK
| | - A Khalil
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
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16
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Spruijt MS, Lopriore E, J Steggerda S, Slaghekke F, Van Klink JMM. Twin-twin transfusion syndrome in the era of fetoscopic laser surgery: antenatal management, neonatal outcome and beyond. Expert Rev Hematol 2020; 13:259-267. [PMID: 31971028 DOI: 10.1080/17474086.2020.1720643] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Introduction: Twin-twin transfusion syndrome (TTTS) is a devastating complication of monochorionic twin pregnancy and remains a major challenge for worldwide fetal medicine specialists. In TTTS, intertwin transfusion through vascular anastomoses in the shared placenta leads to severe hemodynamic imbalance. This review summarizes the current knowledge of TTTS.Areas covered: The most recent insights concerning the management of TTTS, as well as fetal and neonatal complications are described. Relevant articles were selected based on a Pubmed search using the keywords below. Understanding of the underlying pathophysiology has improved greatly as a result of placental injection studies. Advancements in antenatal management have led to increased perinatal survival and a decreased incidence of neonatal complications, including brain injury and neurodevelopmental impairment.Expert opinion: Further opportunities for improvement comprise technological innovations in laser procedures and the prevention of preterm rupture of membranes with subsequent prematurity. A noninvasive treatment such as high-intensity focused ultrasound (HIFU) seems to hold promise for the future treatment of TTTS. Fetal MRI studies are important to improve our understanding of fetal brain injury and should relate their findings to long-term neurodevelopment. International collaboration and centralization of care are of paramount importance to ensure the best care for our patients.
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Affiliation(s)
- Marjolijn S Spruijt
- Department of Pediatrics, Division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Enrico Lopriore
- Department of Pediatrics, Division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Sylke J Steggerda
- Department of Pediatrics, Division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Femke Slaghekke
- Department of Obstetrics, Division of Fetal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeanine M M Van Klink
- Department of Pediatrics, Division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
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17
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Webbe JWH, Ali S, Sakonidou S, Webbe T, Duffy JMN, Brunton G, Modi N, Gale C. Inconsistent outcome reporting in large neonatal trials: a systematic review. Arch Dis Child Fetal Neonatal Ed 2020; 105:69-75. [PMID: 31085676 DOI: 10.1136/archdischild-2019-316823] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 04/17/2019] [Accepted: 04/24/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Inconsistent outcome selection and reporting in clinical trials are important sources of research waste; it is not known how common this problem is in neonatal trials. Our objective was to determine whether large clinical trials involving infants receiving neonatal care report a consistent set of outcomes, how composite outcomes are used and whether parents or former patients were involved in outcome selection. DESIGN A literature search of CENTRAL, CINAHL, EMBASE and MEDLINE was conducted; randomised trials published between 1 July 2012 and 1 July 2017 and involving at least 100 infants in each arm were included. Outcomes and outcome measures were extracted and categorised by physiological system; reported former patient and parent involvement in outcome selection was extracted. RESULTS Seventy-six trials involving 43 126 infants were identified; 216 different outcomes with 889 different outcome measures were reported. Outcome reporting covered all physiological systems but was variable between individual trials: only 67/76 (88%) of trials reported survival and 639 outcome measures were only reported in a single trial. Thirty-three composite outcomes were used in 41 trials. No trials reported former patient or parent involvement in outcome selection. CONCLUSIONS Inconsistent outcome reporting and a lack of parent and former patient involvement in outcome selection in neonatal clinical trials limits the ability of such trials to answer clinically meaningful questions. Developing and implementing a core outcome set for future neonatal trials, with input from all stakeholders, should address these issues.
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Affiliation(s)
| | - Shohaib Ali
- School of Medicine, Imperial College London, London, London, UK
| | | | | | - James M N Duffy
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - Ginny Brunton
- UCL Institute of Education, University College London, London, UK
| | - Neena Modi
- Section of Neonatal Medicine, Imperial College London, London, UK
| | - Chris Gale
- Section of Neonatal Medicine, Imperial College London, London, UK
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Duffy J, Hirsch M, Ziebland S, McManus RJ. Methodological decisions influence the identification of potential core outcomes in studies related to pre-eclampsia: an analysis informing the development of recommendations for future core outcome set developers. BJOG 2019; 126:1482-1490. [PMID: 31359560 DOI: 10.1111/1471-0528.15892] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To quantify the effect of different methodological decisions on the identification of potential core outcomes to inform the development of recommendations for future core coutcome set developers. DESIGN Mixed methods study. SETTING A core outcome set for pre-eclampsia was used as an exemplar. SAMPLE A long list of potential core outcomes was developed by undertaking a systematic review of pre-eclampsia trials and performing a thematic analysis of in-depth patient interviews. METHODS Specific methods used to generate long lists of potential core outcomes were evaluated. RESULTS Different methodological decisions had a substantial impact on the identification of potential core outcomes. Extracting outcomes from published pre-eclampsia trials was an effective way of identifying 48 maternal, eight fetal, 25 neonatal outcomes, and eight patient-reported outcomes. Limiting the extraction of outcomes to primary outcomes or outcomes commonly reported in pre-eclampsia trials reduced the number and diversity of potential core outcomes identified. Thematic analysis of in-depth patient interviews ensured an additional five patient reported outcomes and six outcomes related to future child health were identified. CONCLUSIONS Future core outcome set developers should use quantitative and qualitative methods when developing a long list of potential core outcomes. TWEETABLE ABSTRACT: @OfficialNIHR research published in @BJOGtweets informs new recommendations for future @coreoutcomes developers.
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Affiliation(s)
- Jmn Duffy
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
- Institute for Women's Health, University College London, London, UK
| | - M Hirsch
- Institute for Women's Health, University College London, London, UK
| | - S Ziebland
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - R J McManus
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
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19
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Perry H, Duffy JMN, Reed K, Baschat A, Deprest J, Hecher K, Lewi L, Lopriore E, Oepkes D, Khalil A. Core outcome set for research studies evaluating treatments for twin-twin transfusion syndrome. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 54:255-261. [PMID: 30520170 DOI: 10.1002/uog.20183] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/04/2018] [Accepted: 11/16/2018] [Indexed: 06/09/2023]
Abstract
OBJECTIVE To develop, using a Delphi procedure and a nominal group technique, a core outcome set (COS) for studies evaluating treatments for twin-twin transfusion syndrome (TTTS), which should assist in standardizing outcome selection, collection and reporting in future research studies. METHODS An international steering group comprising healthcare professionals, researchers and patients with experience of TTTS guided the development of this COS. Potential core outcomes, identified through a comprehensive literature review and supplemented by outcomes suggested by the steering group, were entered into a three-round Delphi survey. Healthcare professionals, researchers, and patients or relatives of patients who had experienced TTTS were invited to participate. Consensus was defined a priori using the 15%/70% definition of the Core Outcome Measures in Effectiveness Trials (COMET) initiative. The modified nominal group technique was used to evaluate the consensus outcomes in a face-to-face consultation meeting and identify the final COS. RESULTS One hundred and three participants, from 29 countries, participated in the three-round Delphi survey. Of those, 88 completed all three rounds. Twenty-two consensus outcomes were identified through the Delphi procedure and entered into the modified nominal group technique. The consensus meeting was attended by 11 healthcare professionals, two researchers and three patients; 12 core outcomes were prioritized for inclusion in the COS. Fetal core outcomes included live birth, pregnancy loss (including miscarriage, stillbirth, termination of pregnancy and neonatal mortality), subsequent death of a cotwin following single-twin demise at the time of treatment, recurrence of TTTS, twin anemia-polycythemia sequence and amniotic band syndrome. Neonatal core outcomes included gestational age at delivery, birth weight, brain injury syndromes and ischemic limb injury. Maternal core outcomes included maternal mortality and admission to Level-2 or -3 care setting. One aspirational outcome, neurodevelopment at 18-24 months of age, was also prioritized. CONCLUSIONS Implementing the COS for TTTS within future research studies could make a substantial contribution to advancing the usefulness of research in TTTS. Standardized definitions and measurement instruments are now required for individual core outcomes. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- H Perry
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
| | - J M N Duffy
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
- Balliol College, University of Oxford, Oxford, UK
| | - K Reed
- Twin and Multiple Births Association (TAMBA), Aldershot, UK
| | - A Baschat
- The Johns Hopkins Center for Fetal Therapy, Baltimore, MD, USA
| | - J Deprest
- Department of Obstetrics and Gynecology, University Hospitals of KU Leuven, Leuven, Belgium
- Institute for Women's Health, University College London, London, UK
| | - K Hecher
- Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Neues Klinikum, Hamburg, Germany
| | - L Lewi
- Department of Obstetrics and Gynecology, University Hospitals of KU Leuven, Leuven, Belgium
| | - E Lopriore
- Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - D Oepkes
- Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - A Khalil
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
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20
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Sileo FG, Duffy JMN, Townsend R, Khalil A. Variation in outcome reporting across studies evaluating interventions for selective fetal growth restriction. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 54:10-15. [PMID: 30084183 DOI: 10.1002/uog.19192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 06/08/2023]
Affiliation(s)
- F G Sileo
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
- Prenatal Medicine Unit, Obstetrics and Gynaecology Unit, Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Modena, Italy
| | - J M N Duffy
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
- Balliol College, University of Oxford, Oxford, UK
| | - R Townsend
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
| | - A Khalil
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
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21
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Bovbjerg ML. Current Resources for Evidence-Based Practice, May 2019. J Obstet Gynecol Neonatal Nurs 2019; 48:361-371. [DOI: 10.1016/j.jogn.2019.04.281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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22
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Townsend R, Sileo F, Stocker L, Kumbay H, Healy P, Gordijn S, Ganzevoort W, Beune I, Baschat A, Kenny L, Bloomfield F, Daly M, Devane D, Papageorghiou A, Khalil A. Variation in outcome reporting in randomized controlled trials of interventions for prevention and treatment of fetal growth restriction. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 53:598-608. [PMID: 30523658 DOI: 10.1002/uog.20189] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/13/2018] [Accepted: 11/22/2018] [Indexed: 06/09/2023]
Abstract
OBJECTIVE Although fetal growth restriction (FGR) is well known to be associated with adverse outcomes for the mother and offspring, effective interventions for the management of FGR are yet to be established. Trials reporting interventions for the prevention and treatment of FGR may be limited by heterogeneity in the underlying pathophysiology. The aim of this study was to conduct a systematic review of outcomes reported in randomized controlled trials (RCTs) assessing interventions for the prevention or treatment of FGR, in order to identify and categorize the variation in outcome reporting. METHODS MEDLINE, EMBASE and The Cochrane Library were searched from inception until August 2018 for RCTs investigating therapies for the prevention and treatment of FGR. Studies were assessed systematically and data on outcomes that were reported in the included studies were extracted and categorized. The methodological quality of the included studies was assessed using the Jadad score. RESULTS The search identified 2609 citations, of which 153 were selected for full-text review and 72 studies (68 trials) were included in the final analysis. There were 44 trials relating to the prevention of FGR and 24 trials investigating interventions for the treatment of FGR. The mean Jadad score of all studies was 3.07, and only nine of them received a score of 5. We identified 238 outcomes across the included studies. The most commonly reported were birth weight (88.2%), gestational age at birth (72.1%) and small-for-gestational age (67.6%). Few studies reported on any measure of neonatal morbidity (27.9%), while adverse effects of the interventions were reported in only 17.6% of trials. CONCLUSIONS There is significant variation in outcome reporting across RCTs of therapies for the prevention and treatment of FGR. The clinical applicability of future research would be enhanced by the development of a core outcome set for use in future trials. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- R Townsend
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - F Sileo
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
| | - L Stocker
- Women and Children Division, University Hospital Southampton NHS Foundation Trust, Princess Anne Hospital, Southampton, UK
| | - H Kumbay
- GKT School of Medicine, King's College, London, UK
| | - P Healy
- Health Research Board - Trials Methodology Research Network, Galway, Ireland
- School of Nursing and Midwifery, NUI Galway, Galway, Ireland
| | - S Gordijn
- Department of Obstetrics and Gynecology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - W Ganzevoort
- Department of Obstetrics and Gynecology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - I Beune
- Department of Obstetrics and Gynecology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - A Baschat
- Johns Hopkins Center for Fetal Therapy, Baltimore, MD, USA
| | - L Kenny
- The Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland
| | - F Bloomfield
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - M Daly
- Advocacy and Policymaking, Irish Neonatal Health Alliance, Wicklow, Ireland
| | - D Devane
- Health Research Board - Trials Methodology Research Network, Galway, Ireland
- School of Nursing and Midwifery, NUI Galway, Galway, Ireland
| | - A Papageorghiou
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Nuffield Department of Women's & Reproductive Health, University of Oxford, John Radcliffe Hospital Women's Centre, Oxford, UK
| | - A Khalil
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, London, UK
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
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23
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Piorkowska K, Waspe AC, Wang T, Mougenot C, Ryan G, Drake JM, Gerstle JT. Noninvasive ablation of rabbit fetal and placental tissue targets in utero using magnetic resonance-guided high-intensity focused ultrasound. Prenat Diagn 2019; 39:394-402. [PMID: 30820973 DOI: 10.1002/pd.5443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 01/10/2019] [Accepted: 02/23/2019] [Indexed: 11/07/2022]
Abstract
OBJECTIVE Magnetic resonance-guided high-intensity focused ultrasound (MRgHIFU) is a potential noninvasive therapy for fetal conditions. In utero MRgHIFU delivery and proton resonance frequency shift (PRFS) thermometry monitoring will control accuracy of HIFU ablation and confirm in situ tissue heating in a rabbit model. METHODS High-resolution 3T MR images were acquired in late-gestation rabbits (approximately 30 days, n = 5). HIFU sonications, using magnetic resonance (MR) thermometry as a guide, were delivered to achieve necrosis in relevant fetal targets. Thermometry, posttreatment magnetic resonance imaging (MRI), and follow-up histology confirmed ablation. RESULTS Placentas (n = 14) were treated with 127 ± 34 Wac; thermometry-indicated temperatures reached 67°C. Lungs (n = 8) were treated with 85 ± 15 Wac and reached 73°C, livers (n = 6) with 80 ± 15 Wac and reached 74°C, and kidneys (n = 5) with 100 Wac and reached 66°C. Histological changes showed focal areas of necrosis with circumferential hemorrhage and/or vasodilation, which transitioned abruptly to healthy tissue. CONCLUSION MRgHIFU therapy can effectively target and thermally treat specific in utero organs in this acute fetal rabbit model. PRFS gives in situ temperature control of therapy on tissues. Conceivably, MRgHIFU therapy may be applicable to specific fetal organ anomalies clinically and has the potential to improve the overall fetal outcome over traditional invasive surgical procedures.
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Affiliation(s)
- Karolina Piorkowska
- Centre for Image Guided Innovation and Therapeutic Intervention, Hospital for Sick Children, Toronto, Canada
| | - Adam C Waspe
- Centre for Image Guided Innovation and Therapeutic Intervention, Hospital for Sick Children, Toronto, Canada.,Department of Medical Imaging, University of Toronto, Toronto, Canada
| | - Tao Wang
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Charles Mougenot
- Imaging Division, University Medical Center, Utrecht, The Netherlands
| | - Greg Ryan
- Department of Medical Imaging, University of Toronto, Toronto, Canada.,Fetal Medicine Program, Mount Sinai Hospital, Toronto, Canada.,Department of Obstetrics and Gynaecology, University of Toronto, Toronto, Canada
| | - James M Drake
- Centre for Image Guided Innovation and Therapeutic Intervention, Hospital for Sick Children, Toronto, Canada.,Faculty of Surgery, University of Toronto, Toronto, Canada.,Division of Neurosurgery, Hospital for Sick Children, Toronto, Canada
| | - Justin T Gerstle
- Centre for Image Guided Innovation and Therapeutic Intervention, Hospital for Sick Children, Toronto, Canada.,Faculty of Surgery, University of Toronto, Toronto, Canada.,Division of General and Thoracic Surgery, Hospital for Sick Children, Toronto, Canada
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24
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Duffy JMN, Thompson T, Hinton L, Salinas M, McManus RJ, Ziebland S. What outcomes should researchers select, collect and report in pre-eclampsia research? A qualitative study exploring the views of women with lived experience of pre-eclampsia. BJOG 2019; 126:637-646. [DOI: 10.1111/1471-0528.15616] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2019] [Indexed: 11/30/2022]
Affiliation(s)
- JMN Duffy
- Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
- Balliol College; University of Oxford; Oxford UK
| | - T Thompson
- Radcliffe Women's Health Patient and Public Involvement Panel; Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
| | - L Hinton
- Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
| | - M Salinas
- Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
| | - RJ McManus
- Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
| | - S Ziebland
- Nuffield Department of Primary Care Health Sciences; University of Oxford; Oxford UK
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25
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Khalil A, Duffy JMN, Perry H, Ganzevoort W, Reed K, Baschat AA, Deprest J, Gratacos E, Hecher K, Lewi L, Lopriore E, Oepkes D, Papageorghiou A, Gordijn SJ. Study protocol: developing, disseminating, and implementing a core outcome set for selective fetal growth restriction in monochorionic twin pregnancies. Trials 2019; 20:35. [PMID: 30626413 PMCID: PMC6327411 DOI: 10.1186/s13063-018-3153-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 12/18/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Selective fetal growth restriction in monochorionic twin pregnancies is associated with an increased risk of perinatal mortality and morbidity and represents a clinical dilemma. Interventions include expectant management with early preterm delivery if there are signs of fetal compromise, selective termination of the compromised twin, fetoscopic laser coagulation of the communicating placental vessels or termination of the whole pregnancy. Previous studies evaluating interventions have reported many different outcomes and outcome measures. Such variation makes comparing, contrasting, and combining results challenging, limiting ongoing research on this uncommon condition to inform clinical practice. We aim to produce, disseminate, and implement a core outcome set for selective fetal growth restriction research in monochorionic twin pregnancies. METHODS An international steering group, including professionals, researchers, and lay experts, has been established to oversee the development of this core outcome set. The methods have been guided by the Core Outcome Measures in Effectiveness Trials Initiative Handbook. Potential core outcomes will be developed by undertaking a systematic review of studies evaluating interventions for selective fetal growth restriction in monochorionic twin pregnancies. Potential core outcomes will be entered into a three-round Delphi survey and key stakeholders including clinical professionals, researchers, and lay experts will be invited to participate. Repeated reflection and rescoring of individual outcomes should encourage group and individual stakeholder convergence towards consensus outcomes which will be entered into a modified Nominal Group Technique to finalize the core outcome set. Once core outcomes have been agreed, we will establish standardized definitions and recommend high-quality measurement instruments for each outcome. DISCUSSION The development, dissemination, and implementation of a core outcome set for selective fetal growth restriction should ensure that future research protocols select, collect, and report outcomes and outcome measures in a standardized manner. Data synthesis will be possible on a broad level and rigorous implementation should advance the quality of research studies and their effective use in order to guide clinical practice, improve patient care, maternal, short-term perinatal outcomes, and long-term neurodevelopmental outcomes. TRIAL REGISTRATION Core Outcome Measures in Effectiveness Trials (COMET) registration number: 998. International Prospective Register of Systematic Reviews (PROSPERO) registration number: CRD42018092697 . 18th April 2018.
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Affiliation(s)
- Asma Khalil
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, Cranmer Terrace, London, SW17 0RE, UK. .,Fetal Medicine Unit, Department of Obstetrics and Gynaecology, St. George's University Hospitals NHS Foundation Trust, Blackshaw Road, London, SW17 0QT, UK.
| | - James M N Duffy
- Balliol College, University of Oxford, Broad Street, Oxford, OX1 3BJ, UK.,Nuffield Department of Primary Care Health Sciences, University of Oxford, Radcliffe Primary Care Building, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, UK
| | - Helen Perry
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, Cranmer Terrace, London, SW17 0RE, UK.,Fetal Medicine Unit, Department of Obstetrics and Gynaecology, St. George's University Hospitals NHS Foundation Trust, Blackshaw Road, London, SW17 0QT, UK
| | - Wessel Ganzevoort
- Department of Obstetrics and Gynecology, Academic Medical Center Amsterdam, University of Amsterdam, Amsterdam, The Netherlands
| | - Keith Reed
- Twin and Multiple Births Association (TAMBA), The Manor House Manor Park, Church Hill, Aldershot, GU12 4JU, UK
| | - Ahmet A Baschat
- The Johns Hopkins Center for Fetal Therapy, 600 North Wolfe, Nelson 228, Baltimore, MD, 21287, USA
| | - Jan Deprest
- Department of Obstetrics and Gynecology, University Hospitals of KU Leuven, Herestraat, 49 3000, Leuven, Belgium
| | - Eduardo Gratacos
- Barcelona Center for Maternal-Fetal and Neonatal Medicine, Hospital Clínic and Hospital Sant Joan de Deu, Universitat de Barcelona; Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - Kurt Hecher
- Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Neues Klinikum, Gebäude O10 Martinistr. 52, 20246, Hamburg, Germany
| | - Liesbeth Lewi
- Department of Obstetrics and Gynecology, University Hospitals of KU Leuven, Herestraat, 49 3000, Leuven, Belgium
| | - Enrico Lopriore
- Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Center, K-06-35, P.O. Box 9600, 2300RC, Leiden, The Netherlands
| | - Dick Oepkes
- Division of Fetal Medicine, Department of Obstetrics, Leiden University Medical Center, K-06-35, P.O. Box 9600, 2300RC, Leiden, The Netherlands
| | - Aris Papageorghiou
- Fetal Medicine Unit, Department of Obstetrics and Gynaecology, St. George's University Hospitals NHS Foundation Trust, Blackshaw Road, London, SW17 0QT, UK
| | - Sanne J Gordijn
- Department of Obstetrics and Gynecology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Bamberg C, Hecher K. Update on twin-to-twin transfusion syndrome. Best Pract Res Clin Obstet Gynaecol 2019; 58:55-65. [PMID: 30850326 DOI: 10.1016/j.bpobgyn.2018.12.011] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 12/31/2018] [Indexed: 12/20/2022]
Abstract
Twin-to-twin transfusion syndrome (TTTS) is a serious complication that affects 10-15% of monochorionic multiple pregnancies. Communicating placental vessels on the chorionic plate between the donor and recipient twin are responsible for the imbalance of blood flow. There is evidence for the superiority of fetoscopic laser ablation over serial amnioreductions regarding survival and neurological outcome for stages II-IV TTTS. However, the optimal management of stage I is still debated. The "Solomon" technique showed a significant reduction in recurrent TTTS and post laser twin anemia-polycythemia sequence (TAPS) in comparison to the selective laser method without improvement in perinatal mortality or neonatal morbidity. Survival rates after fetoscopic laser surgery have significantly increased over the last 25 years. High volume centers report up to 70% double survival and at least one survivor in >90%. Long-term neurodevelopmental impairment occurs in about 10% of children after laser surgery. In this review we discuss the optimal management, innovations in laser technique, long-term neurodevelopmental outcome, and future aspects of TTTS treatment.
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Affiliation(s)
- Christian Bamberg
- University Medical Center Hamburg-Eppendorf, Department of Obstetrics and Fetal Medicine, Hamburg, Germany.
| | - Kurt Hecher
- University Medical Center Hamburg-Eppendorf, Department of Obstetrics and Fetal Medicine, Hamburg, Germany
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27
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Braga M, Moleiro ML, Guedes-Martins L. Clinical Significance of Ductus Venosus Waveform as Generated by Pressure- volume Changes in the Fetal Heart. Curr Cardiol Rev 2019; 15:167-176. [PMID: 30644348 PMCID: PMC6719393 DOI: 10.2174/1573403x15666190115142303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 01/02/2019] [Accepted: 01/04/2019] [Indexed: 12/17/2022] Open
Abstract
The ductus venosus is a vascular shunt situated within the fetal liver parenchyma, connecting the umbilical vein to the inferior vena cava. This vessel acts as a bypass of the liver microcirculation and plays a critical role in the fetal circulation. The ductus venosus allows oxygenated and nutrient-rich venous blood to flow from the placenta to the myocardium and brain. Increased impedance to flow in the fetal ductus venosus is associated with fetal aneuploidies, cardiac defects and other adverse pregnancy outcomes. This review serves to improve our understanding of the mechanisms that regulate the blood flow redistribution between the fetal liver circulation and fetal heart and the clinical significance of the ductus venosus waveform as generated by pressure-volume changes in the fetal heart.
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Affiliation(s)
| | | | - Luís Guedes-Martins
- Address correspondence to this author at the Departamento da Mulher e da Medicina Reprodutiva, Centro Materno Infantil do Norte, Centro Hospitalar do Porto, Largo da Maternidade 4050-371 Porto, Porto, Portugal; Tel: +351 222 077 500; E-mail:
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28
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Khalil A, Thilaganathan B. Selective fetal growth restriction in monochorionic twin pregnancy: a dilemma for clinicians and a challenge for researchers. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2019; 53:23-25. [PMID: 30125419 DOI: 10.1002/uog.20093] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 07/29/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Affiliation(s)
- A Khalil
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
| | - B Thilaganathan
- Vascular Biology Research Centre, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
- Fetal Medicine Unit, St George's University Hospitals NHS Foundation Trust, University of London, London, UK
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29
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de Mattos Lourenco TR, Pergialiotis V, Duffy JMN, Durnea C, Elfituri A, Haddad JM, Betschart C, Falconi G, Doumouchtsis SK. A systematic review on reporting outcomes and outcome measures in trials on synthetic mesh procedures for pelvic organ prolapse: Urgent action is needed to improve quality of research. Neurourol Urodyn 2018; 38:509-524. [DOI: 10.1002/nau.23871] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 09/24/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Thais R. de Mattos Lourenco
- Department of Obstetrics and GynaecologyUrogynaecology DivisionHospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo São PauloBrazil
| | - Vasilis Pergialiotis
- Laboratory of Experimental Surgery and Surgical Research N S ChristeasUniversity of Athens, Medical SchoolAthensGreece
| | - James M. N. Duffy
- Balliol CollegeUniversity of OxfordOxfordUnited Kingdom
- Nuffield Department of Primary Care Health SciencesUniversity of OxfordOxfordUnited Kingdom
| | - Constantin Durnea
- Department of Obstetrics GynaecologyEpsom St Helier University Hospitals NHS TrustLondonUnited Kingdom
| | - Abdullatif Elfituri
- Department of Obstetrics GynaecologyEpsom St Helier University Hospitals NHS TrustLondonUnited Kingdom
| | - Jorge M. Haddad
- Department of Obstetrics and GynaecologyUrogynaecology DivisionHospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo São PauloBrazil
| | | | - Gabriele Falconi
- Department of Obstetrics and GynaecologySan Bortolo HospitalVicenzaItaly
| | - Stergios K. Doumouchtsis
- Laboratory of Experimental Surgery and Surgical Research N S ChristeasUniversity of Athens, Medical SchoolAthensGreece
- Department of Obstetrics GynaecologyEpsom St Helier University Hospitals NHS TrustLondonUnited Kingdom
- St George's University of LondonLondonUK
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Durnea CM, Pergialiotis V, Duffy JMN, Bergstrom L, Elfituri A, Doumouchtsis SK. A systematic review of outcome and outcome-measure reporting in randomised trials evaluating surgical interventions for anterior-compartment vaginal prolapse: a call to action to develop a core outcome set. Int Urogynecol J 2018; 29:1727-1745. [PMID: 30350116 PMCID: PMC6244754 DOI: 10.1007/s00192-018-3781-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/12/2018] [Indexed: 01/02/2023]
Abstract
Introduction We assessed outcome and outcome-measure reporting in randomised controlled trials evaluating surgical interventions for anterior-compartment vaginal prolapse and explored the relationships between outcome reporting quality with journal impact factor, year of publication, and methodological quality. Methods We searched the bibliographical databases from inception to October 2017. Two researchers independently selected studies and assessed study characteristics, methodological quality (Jadad criteria; range 1–5), and outcome reporting quality Management of Otitis Media with Effusion in Cleft Palate (MOMENT) criteria; range 1–6], and extracted relevant data. We used a multivariate linear regression to assess associations between outcome reporting quality and other variables. Results Eighty publications reporting data from 10,924 participants were included. Seventeen different surgical interventions were evaluated. One hundred different outcomes and 112 outcome measures were reported. Outcomes were inconsistently reported across trials; for example, 43 trials reported anatomical treatment success rates (12 outcome measures), 25 trials reported quality of life (15 outcome measures) and eight trials reported postoperative pain (seven outcome measures). Multivariate linear regression demonstrated a relationship between outcome reporting quality with methodological quality (β = 0.412; P = 0.018). No relationship was demonstrated between outcome reporting quality with impact factor (β = 0.078; P = 0.306), year of publication (β = 0.149; P = 0.295), study size (β = 0.008; P = 0.961) and commercial funding (β = −0.013; P = 0.918). Conclusions Anterior-compartment vaginal prolapse trials report many different outcomes and outcome measures and often neglect to report important safety outcomes. Developing, disseminating and implementing a core outcome set will help address these issues.
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Affiliation(s)
- Constantin M Durnea
- Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, Rowan House, Dorking Road, Epsom, London, KT18 7EG, UK.,Nortwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
| | - Vasilios Pergialiotis
- Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, Athens University Medical School, Athens, Greece
| | - James M N Duffy
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.,Balliol College, University of Oxford, Oxford, UK
| | | | - Abdullatif Elfituri
- Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, Rowan House, Dorking Road, Epsom, London, KT18 7EG, UK
| | - Stergios K Doumouchtsis
- Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, Rowan House, Dorking Road, Epsom, London, KT18 7EG, UK. .,Laboratory of Experimental Surgery and Surgical Research N.S. Christeas, Athens University Medical School, Athens, Greece. .,St George's University of London, London, UK.
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Pergialiotis V, Durnea C, Elfituri A, Duffy J, Doumouchtsis SK. Do we need a core outcome set for childbirth perineal trauma research? A systematic review of outcome reporting in randomised trials evaluating the management of childbirth trauma. BJOG 2018; 125:1522-1531. [PMID: 30009461 DOI: 10.1111/1471-0528.15408] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND Selecting appropriate outcomes to reflect both beneficial and harmful effects is a critical step in designing childbirth trauma trials. OBJECTIVE To evaluate the outcomes and outcome measures reported in randomised controlled trials evaluating interventions for childbirth trauma. SEARCH STRATEGY Randomised trials were identified by searching bibliographical databases including the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, and EMBASE. SELECTION CRITERIA Randomised trials evaluating the efficacy and safety of different techniques in the management of perineal lacerations. DATA COLLECTION AND ANALYSIS Two researchers independently assessed studies for inclusion, evaluated methodological quality, and extracted the relevant data. Spearman's ρ correlation and multivariate linear regression analysis using the backward stepwise model were used for analysis. MAIN RESULTS Forty-eight randomised trials, reporting data from 20 308 women, were included. Seventeen different interventions were evaluated. Included trials reported 77 different outcomes and 50 different outcome measures. Commonly reported outcomes included pain (34 trials; 70%), wound healing (20 trials; 42%), and anorectal dysfunction (16 trials, 33%). In the multivariate analysis, no relationship was demonstrated between the quality of outcome reporting and year of publication (P = 0.31), journal impact factor (P = 0.49), and methodological quality (P = 0.13). CONCLUSION Outcome reporting in childbirth trauma research is heterogeneous. Developing, disseminating, and implementing a core outcome set in future childbirth trauma research could help address these issues. TWEETABLE ABSTRACT Developing @coreoutcomes for childbirth trauma research could help to reduce #research waste.
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Affiliation(s)
- V Pergialiotis
- Laboratory of Experimental Surgery and Surgical Research NS Christeas, Athens University Medical School, Athens, Greece
| | - C Durnea
- Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, London, UK.,St George's University of London, London, UK
| | - A Elfituri
- Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, London, UK.,St George's University of London, London, UK
| | - Jmn Duffy
- Balliol College, University of Oxford, Oxford, UK.,Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - S K Doumouchtsis
- Laboratory of Experimental Surgery and Surgical Research NS Christeas, Athens University Medical School, Athens, Greece.,Department of Obstetrics and Gynaecology, Epsom and St Helier University Hospitals NHS Trust, London, UK.,St George's University of London, London, UK
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