1
|
Neurodevelopmental Outcomes of Twins Compared With Singleton Children: A Systematic Review. Twin Res Hum Genet 2018; 21:136-145. [PMID: 29415789 DOI: 10.1017/thg.2018.3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
More than 200 million children aged <5 years fail to reach their full cognitive potential, and children born as twins are particularly at risk. In this article, we review studies that examined differences in the neurodevelopmental outcomes of twins compared to singletons. We searched the Medline database for articles on twins, singletons, neuro, and cognitive development. We also inspected bibliographies of relevant publications to identify related articles from 2011 to 2017. Our search criteria yielded 162 studies, 8 of which met the inclusion criteria. Of the eight studies examined, four were prospective follow-up studies, three were cross-sectional studies, and one was a randomized controlled trial. Five of these studies were carried out in developed countries, and they found no statistically significant difference in neurodevelopmental outcomes among twins and singletons. However, two of the three studies carried out in developing countries found a difference with singletons having significantly higher academic ratings than twins. Studies in which neurodevelopmental outcomes were measured early in life (1-5 years) showed no significant twin-singleton differences, while those in which it was measured later in life showed mixed twin-singleton differences. Overall, these studies may have been underpowered and may not have been optimally designed and implemented. There is need for studies with adequate sample sizes, good design, and optimal measurement of all relevant covariates in order to resolve the conflicting reports in the literature.
Collapse
|
2
|
Heino A, Gissler M, Hindori-Mohangoo AD, Blondel B, Klungsøyr K, Verdenik I, Mierzejewska E, Velebil P, Sól Ólafsdóttir H, Macfarlane A, Zeitlin J. Variations in Multiple Birth Rates and Impact on Perinatal Outcomes in Europe. PLoS One 2016; 11:e0149252. [PMID: 26930069 PMCID: PMC4773186 DOI: 10.1371/journal.pone.0149252] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 01/11/2016] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE Infants from multiple pregnancies have higher rates of preterm birth, stillbirth and neonatal death and differences in multiple birth rates (MBR) exist between countries. We aimed to describe differences in MBR in Europe and to investigate the impact of these differences on adverse perinatal outcomes at a population level. METHODS We used national aggregate birth data on multiple pregnancies, maternal age, gestational age (GA), stillbirth and neonatal death collected in the Euro-Peristat project (29 countries in 2010, N = 5 074 643 births). We also used European Society of Human Reproduction and Embryology (ESHRE) data on assisted conception and single embryo transfer (SET). The impact of MBR on outcomes was studied using meta-analysis techniques with random-effects models to derive pooled risk ratios (pRR) overall and for four groups of country defined by their MBR. We computed population attributable risks (PAR) for these groups. RESULTS In 2010, the average MBR was 16.8 per 1000 women giving birth, ranging from 9.1 (Romania) to 26.5 (Cyprus). Compared to singletons, multiples had a nine-fold increased risk (pRR 9.4, 95% Cl 9.1-9.8) of preterm birth (<37 weeks GA), an almost 12-fold increased risk (pRR 11.7, 95% CI 11.0-12.4) of very preterm birth (<32 weeks GA). Pooled RR were 2.4 (95% Cl 1.5-3.6) for fetal mortality at or after 28 weeks GA and 7.0 (95% Cl 6.1-8.0) for neonatal mortality. PAR of neonatal death and very preterm birth were higher in countries with high MBR compared to low MBR (17.1% (95% CI 13.8-20.2) versus 9.8% (95% Cl 9.6-11.0) for neonatal death and 29.6% (96% CI 28.5-30.6) versus 17.5% (95% CI 15.7-18.3) for very preterm births, respectively). CONCLUSIONS Wide variations in MBR and their impact on population outcomes imply that efforts by countries to reduce MBR could improve perinatal outcomes, enabling better long-term child health.
Collapse
Affiliation(s)
- Anna Heino
- THL National Institute for Health and Welfare, Helsinki, Finland
| | - Mika Gissler
- THL National Institute for Health and Welfare, Helsinki, Finland
| | - Ashna D. Hindori-Mohangoo
- TNO, Netherlands Organisation for Applied Scientific Research, Department Child Health, Leiden, The Netherlands
- Anton de Kom University of Suriname, Faculty of Medical Sciences, Department Public Health, Paramaribo, Suriname
| | - Béatrice Blondel
- INSERM, Obstetrical, Perinatal and Paediatric Epidemiology Research Team, Centre for Epidemiology and Biostatistics (U1153), Paris-Descartes University, Paris, France
| | - Kari Klungsøyr
- Department of Global Public Health and Primary Care, University of Bergen and Medical Birth Registry of Norway, Norwegian Institute of Public Health, 5018, Bergen, Norway
| | - Ivan Verdenik
- Ljubljana University Medical Center, Ljubljana, Slovenia
| | - Ewa Mierzejewska
- Department of Epidemiology, National Research Institute of Mother and Child, Warsaw, Poland
| | - Petr Velebil
- Institute for the Care of Mother and Child, Prague, Czech Republic
| | - Helga Sól Ólafsdóttir
- Department of Obstetrics and Gynaecology, Landspitali University Hospital, Reykjavik, Iceland
| | - Alison Macfarlane
- Centre for Maternal and Child Health Research, School of Health Sciences, City University London, London, Great Britain
| | - Jennifer Zeitlin
- INSERM, Obstetrical, Perinatal and Paediatric Epidemiology Research Team, Centre for Epidemiology and Biostatistics (U1153), Paris-Descartes University, Paris, France
| | | |
Collapse
|
3
|
Merry L, Small R, Blondel B, Gagnon AJ. International migration and caesarean birth: a systematic review and meta-analysis. BMC Pregnancy Childbirth 2013; 13:27. [PMID: 23360183 PMCID: PMC3621213 DOI: 10.1186/1471-2393-13-27] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 01/23/2013] [Indexed: 12/18/2022] Open
Abstract
Background Perinatal health disparities including disparities in caesarean births have been observed between migrant and non-migrant women and some literature suggests that non-medical factors may be implicated. A systematic review was conducted to determine if migrants in Western industrialized countries consistently have different rates of caesarean than receiving-country-born women and to identify the reasons that explain these differences. Methods Reports were identified by searching 12 literature databases (from inception to January 2012; no language limits) and the web, by bibliographic citation hand-searches and through key informants. Studies that compared caesarean rates between international migrants and non-migrants living in industrialized countries and that did not have a ‘fatal flaw’ according to the US Preventative Services Task Force criteria were included. Studies were summarized, analyzed descriptively and where possible, meta-analyzed. Results Seventy-six studies met inclusion criteria. Caesarean rates between migrants and non-migrants differed in 69% of studies. Meta-analyses revealed consistently higher overall caesarean rates for Sub-Saharan African, Somali and South Asian women; higher emergency rates for North African/West Asian and Latin American women; and lower overall rates for Eastern European and Vietnamese women. Evidence to explain the consistently different rates was limited. Frequently postulated risk factors for caesarean included: language/communication barriers, low SES, poor maternal health, GDM/high BMI, feto-pelvic disproportion, and inadequate prenatal care. Suggested protective factors included: a healthy immigrant effect, preference for a vaginal birth, a healthier lifestyle, younger mothers and the use of fewer interventions during childbirth. Conclusion Certain groups of international migrants consistently have different caesarean rates than receiving-country-born women. There is insufficient evidence to explain the observed differences.
Collapse
Affiliation(s)
- Lisa Merry
- Ingram School of Nursing, McGill University, Montreal, QC, Canada.
| | | | | | | |
Collapse
|
4
|
Gagnon AJ, Van Hulst A, Merry L, George A, Saucier JF, Stanger E, Wahoush O, Stewart DE. Cesarean section rate differences by migration indicators. Arch Gynecol Obstet 2012; 287:633-9. [PMID: 23132050 DOI: 10.1007/s00404-012-2609-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 10/23/2012] [Indexed: 11/29/2022]
Abstract
PURPOSE To answer the question: are there differences in cesarean section rates among childbearing women in Canada according to selected migration indicators? METHODS Secondary analyses of 3,500 low-risk women who had given birth between January 2003 and April 2004 in one of ten hospitals in the major Canadian migrant-receiving cities (Montreal, Toronto, Vancouver) were conducted. Women were categorized as non-refugee immigrant, asylum seeker, refugee, or Canadian-born and by source country world region. Stratified analyses were performed. RESULTS Cesarean section rates differed by migration status for women from two source regions: South East and Central Asia (non-refugee immigrants 26.0 %, asylum seekers 28.6 %, refugees 56.7 %, p = 0.001) and Latin America (non-refugee immigrants 37.7 %, asylum seekers 25.6 %, refugees 10.5 %, p = 0.05). Of these, low-risk refugee women who had migrated to Canada from South East and Central Asia experienced excess cesarean sections, while refugees from Latin America experienced fewer, compared to Canadian-born (25.4 %, 95 % CI 23.8-27.3). Cesarean section rates of African women were consistently high (31-33 %) irrespective of their migration status but were not statistically different from Canadian-born women. Although it did not reach statistical significance, risk for cesarean sections also differed by time since migration (≤2 years 29.8 %, >2 years 47.2 %). CONCLUSION Migration status, source region, and time since migration are informative migration indicators for cesarean section risk.
Collapse
Affiliation(s)
- Anita J Gagnon
- Ingram School of Nursing and Department of Obstetrics and Gynecology, McGill University, Montreal, Canada.
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Río I, Castelló A, Barona C, Jané M, Más R, Rebagliato M, Bosch S, Martínez E, Bolúmar F. Caesarean section rates in immigrant and native women in Spain: the importance of geographical origin and type of hospital for delivery. Eur J Public Health 2010; 20:524-9. [PMID: 20522515 DOI: 10.1093/eurpub/ckq067] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Isabel Río
- Division of Environmental and Reproductive Epidemiology, Spanish Network for Research in Epidemiology and Public Health (CIBERESP), Spain
| | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Papiernik E, Zeitlin J, Delmas D, Blondel B, Kunzel W, Cuttini M, Weber T, Petrou S, Gortner L, Kollee L, Draper ES. Differences in outcome between twins and singletons born very preterm: results from a population-based European cohort. Hum Reprod 2010; 25:1035-43. [DOI: 10.1093/humrep/dep430] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
7
|
Koregol MC, Nayak R, Kandasamy S, Bhandary A, Mahale N, Dodawad A. Fetus papyraceous: a rare cause for obstruction to spontaneous placental expulsion. Arch Gynecol Obstet 2009; 279:945-7. [DOI: 10.1007/s00404-009-0930-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2008] [Accepted: 01/03/2009] [Indexed: 11/28/2022]
|
8
|
Van Naarden Braun K, Schieve L, Daniels J, Durkin M, Giarelli E, Kirby RS, Lee LC, Newschaffer C, Nicholas J, Pinto-Martin J. Relationships between multiple births and autism spectrum disorders, cerebral palsy, and intellectual disabilities: autism and developmental disabilities monitoring (ADDM) network-2002 surveillance year. Autism Res 2008; 1:266-74. [PMID: 19360679 DOI: 10.1002/aur.41] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Since the 1970s, the prevalence of multiple births (MBs) in the United States has increased significantly. This has been attributed, in large part, to iatrogenic MBs resulting from infertility treatments that include ovulation stimulation. A past study has indicated that children from MBs have an increased prevalence of cerebral palsy (CP). Other studies also have suggested an association between MBs and intellectual disabilities (ID) and autism spectrum disorders (ASDs); however, results have been inconsistent. From the Autism and Developmental Disabilities Monitoring (ADDM) Network, a surveillance project among several US populations, we obtained MB estimates among children born in 1994 and classified by 8 years of age as having: an ASD (n=1,626 total children from 11 sites; 50 born as part of an MB); CP (n=302 total children from 3 sites; 25 born as part of an MB); or ID (n=1,195 total children from 3 sites; 45 born as part of an MB). All three MB estimates were notably higher than age-adjusted expected estimates of naturally conceived MBs derived from 1971 US natality data. However, when MB estimates from the ADDM Network were compared with expected MB estimates derived from 1994 natality data for the states corresponding to the relevant ADDM Network sites, we observed no association with ASDs (observed/expected=1.08 [0.78-1.38]), a moderate, but not statistically significant association with ID (observed/expected=1.34 [0.95-1.73]), and a strong association with CP (observed/expected=2.96 [1.80-4.12]). Further investigation of specific types of MBs (natural vs. iatrogenic) is warranted.
Collapse
Affiliation(s)
- Kim Van Naarden Braun
- Developmental Disabilities Branch, National Centers on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, 1600 Clifton Road (MS E-86), Atlanta, GA 30333, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Hemminki K, Li X, Sundquist K, Sundquist J. High familial risks for cerebral palsy implicate partial heritable aetiology. Paediatr Perinat Epidemiol 2007; 21:235-41. [PMID: 17439532 DOI: 10.1111/j.1365-3016.2007.00798.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cerebral palsy is the commonest cause of severe childhood disability, the aetiology of which is largely unknown. Data on familial aggregation of cerebral palsy are very limited. We defined familial risks for siblings who were hospitalised because of cerebral palsy in Sweden. A nationwide database for neurological diseases was constructed by linking the Multigeneration Register to the Hospital Discharge Register for the years 1987-2001. Standardised hospitalisation ratios (SHRs) were calculated for affected singletons and twins by comparing them with siblings who had no cerebral palsy. A total of 3997 patients were recorded with cerebral palsy. Familial cerebral palsy was uncommon, and it accounted for 1.6% of all cerebral palsy cases. However, for parents who had had one affected child the risk of recurrence in another child was considerably increased. Parents of one affected child had a 4.8-fold risk of having a second affected child, and where the siblings were twins, the risk was 29-fold. These familial risks were particularly high in some clinical subgroups: 17-25 in singletons and 37-155 in twins, including hemiplegia, diplegia and quadriplegia. The remarkably high familial risks are difficult to explain without some contribution of heritable factors. The lack of discordant pairs may suggest that heritable factors are disorder type-specific. Affected concordant sibling pairs should be subjected to molecular studies aiming at identifying the susceptibility gene.
Collapse
Affiliation(s)
- Kari Hemminki
- Division of Molecular Genetic Epidemiology, German Cancer Research Centre, Heidelberg, Germany.
| | | | | | | |
Collapse
|
10
|
Surman G, Bonellie S, Chalmers J, Colver A, Dolk H, Hemming K, King A, Kurinczuk JJ, Parkes J, Platt MJ. UKCP: a collaborative network of cerebral palsy registers in the United Kingdom. J Public Health (Oxf) 2006; 28:148-56. [PMID: 16556625 DOI: 10.1093/pubmed/fdi087] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Cerebral palsy (CP) is a relatively rare condition with enormous social and financial impact. Information about CP is not routinely collected in the United Kingdom. We have pooled non-identifiable data from the five currently active UK CP registers to form the UKCP database: birth years 1960-1997. This article describes the rationale behind this collaboration and the creation of the database. Data about 6910 children with CP are currently held. The mean annual prevalence rate was 2.1 [corrected] per 1000 live births for birth years 1986-1996. Where type is known, 91 per cent have spastic CP. Where data are available, nearly one-third of children have severely impaired lower limb function, and nearly a quarter have severely impaired upper limb function. As well as describing the range and complexity of motor and associated impairments, the pooled data from the UKCP database provide a platform for studies of aetiology, long-term outcomes, participation and service needs. The UKCP database is an important national resource for the surveillance of CP and the study of its epidemiology in the United Kingdom.
Collapse
Affiliation(s)
- Geraldine Surman
- National Perinatal Epidemiology Unit, University of Oxford, Old Road Campus, Headington, Oxford OX3 7LF, UK.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Current awareness in prenatal diagnosis. Prenat Diagn 2005. [DOI: 10.1002/pd.1022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|