The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.
The influence of mode of delivery on twin neonatal mortality in the US: Variance by birth weight discordance.
Open accessAbstract
Objective The purpose of this study was to examine if neonatal mortality rates (NMR) based on birth weight discordance (BWD) differ based on mode of delivery.Study design The population-based US "matched multiple birth" database (1995 to 1998) was used to examine the effect of vaginal/vaginal (VV) and cesarean/cesarean (CC) modes of delivery (MOD) on neonatal mortality (<28 days after birth). Births at <32 weeks, congenital malformations, chromosomal anomalies, and discordant MOD (vaginal/cesarean) were excluded. The association between MOD (with CC as the reference) and neonatal mortality was expressed as relative risks (RR) with 95% CI, derived from logistic regression models.Results The NMR increased with increasing degrees of BWD regardless of mode of delivery. CC was associated with decreased NMR when BWD was between 20% and 40%, but this reached significance at BWD > or =40%; VV pairs had a 1.6-fold (95% CI 1.1-2.2) increased NMR compared with CC.Conclusion In twins with BWD <40%, MOD has no effect on NMR. Beyond or equal to 40% discordance, there was lower NMR with cesarean-cesarean delivery.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
There is weak evidence that caesarean delivery protects against stillbirth of the second twin if the second twin is 40% larger than the first twin.
“There is weak evidence that caesarean delivery protects against stillbirth of the second twin if the second twin is 40% larger than the first twin [56, 57].”
From Comparison of perinatal outcome and mode of birth of twin and singleton pregnancies in migrant and refugee populations on the Thai Myanmar border: A population cohort (2024) · cites this paper as [56]
The Results (page not available) report lower neonatal mortality with caesarean–caesarean delivery than with vaginal–vaginal delivery when birth-weight discordance was at least 40%. But the study analysed live-born twin pairs, not stillbirth of the second twin, and did not establish that the larger twin was born second. The Methods (page not available) also define 40% discordance relative to the larger twin’s weight, not as the larger twin weighing 40% more than the first. (LLM, conf=0.91)
Experimental — accuracy not yet measuredThe relative risk on neonatal mortality when the discordance is more than 40% rate, is 1.6 (1.1-2.2) for vaginal birth compared to caesarean delivery.
“The relative risk on neonatal mortality when the discordance is more than 40% rate, is 1.6 (1.1–2.2) for vaginal birth compared to caesarean delivery [56].”
Discordance in weight is a possible sign of uteroplacental dysfunction and increases the risk of perinatal mortality.
“Discordance in weight is a possible sign of uteroplacental dysfunction and increases the risk of perinatal mortality [56].”
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Longitudinal data analysis using generalized linear models
LIANG, K.-Y., & ZEGER, S. L. (1986) · Biometrika · doi:10.1093/biomet/73.1.13 · Cited by 18,550
Kramer, M. S. (1988) · JAMA · doi:10.1001/jama.1988.03410220090034 · Cited by 430
Johannes, C. B. (1993) · Fertility and Sterility · doi:10.1016/s0015-0282(16)55656-8 · Cited by 312
Consequences of in-utero death in a twin pregnancy
Pharoah, P., & Adi, Y. (2000) · The Lancet · doi:10.1016/s0140-6736(00)02215-7 · Cited by 231
Trends in twin and triplet births: 1980-97.
Martin, J. A., & Park, M. M. (1999) · PubMed · Cited by 195
Annual Summary of Vital Statistics—1996
Guyer, B., Martin, J. A., MacDorman, M. F., Anderson, R. N., & Strobino, D. M. (1997) · PEDIATRICS · doi:10.1542/peds.100.6.905 · Cited by 175
Outcome of twin pregnancies according to intrapair birth weight differences
Hollier, L. H. (1999) · Obstetrics and Gynecology · doi:10.1016/s0029-7844(99)00500-1 · Cited by 158
Society for Assisted Reproductive Technology and American Society for Reproductive Medicine*e1 (2000) · Fertility and Sterility · doi:10.1016/s0015-0282(00)01559-4 · Cited by 155
Demissie, K. (2002) · Obstetrics and Gynecology · doi:10.1016/s0029-7844(02)01951-8 · Cited by 149
A method of imputing length of gestation on birth certificates.
Taffel, S. M., Johnson, D., & Heuser, R. (1982) · PubMed · Cited by 139
Erkkola, R., Ala‐Mello, S., PIIROINEN, O., et al. (1985) · PubMed · Cited by 136
The effect of birth weight discordance on twin neonatal mortality
Branum, A. M. (2003) · Obstetrics and Gynecology · doi:10.1016/s0029-7844(02)03119-8 · Cited by 135
What Is the Population-Based Risk of Preterm Birth Among Twins and Other Multiples?
Kiely, J. (1998) · Clinical Obstetrics & Gynecology · doi:10.1097/00003081-199803000-00005 · Cited by 132
Is Discordant Growth in Twins an Independent Risk Factor for Adverse Neonatal Outcome?
Amaru, R., Bush, M. C., Berkowitz, R. L., et al. (2004) · Obstetrics and Gynecology · doi:10.1097/01.aog.0000104060.37475.29 · Cited by 130
Normal and abnormal growth of multiples
Blickstein, I. (2002) · Seminars in Neonatology · doi:10.1053/siny.2002.0105 · Cited by 120
The epidemiology of neonatal death in twins
McCarthy, B. J., Sachs, B. P., Layde, P. M., et al. (1981) · American Journal of Obstetrics and Gynecology · doi:10.1016/s0002-9378(16)32628-x · Cited by 120
Errors in gestational age: evidence of bleeding early in pregnancy.
Gjessing, H. K., Skjærven, R., & Wilcox, A. J. (1999) · American Journal of Public Health · doi:10.2105/ajph.89.2.213 · Cited by 119
Society for Assisted Reproductive Technology, & American Society for Reproductive Medicine**e1 (2002) · Fertility and Sterility · doi:10.1016/s0015-0282(01)02985-5 · Cited by 114
Revised U.S. Certificate of Birth—New Opportunities for Research on Birth Outcome
Taffel, S. M., Ventura, S. J., & Gay, G. A. (1989) · Birth · doi:10.1111/j.1523-536x.1989.tb00896.x · Cited by 83
Twin birth weight discordance and risk of preterm birth
COOPERSTOCK, M. S., TUMMARUB, R., Bakewell, J., & SCHRAMM, W. F. (2000) · American Journal of Obstetrics and Gynecology · doi:10.1016/s0002-9378(00)55604-x · Cited by 82
First trimester prediction of growth discordance in twin gestations
Kalish, R. B., Chasen, S. T., Gupta, M., et al. (2003) · American Journal of Obstetrics and Gynecology · doi:10.1067/s0002-9378(03)00714-2 · Cited by 79
Adaptive growth restriction as a pattern of birth weight discordance in twin gestations
Blickstein, I. (2000) · Obstetrics and Gynecology · doi:10.1016/s0029-7844(00)01079-6 · Cited by 64
Twin birth weight discordance and risk of preterm birth
Cooperstock, M. S., Tummaru, R., Bakewell, J., et al. (2000) · American Journal of Obstetrics and Gynecology · doi:10.1067/mob.2000.105346 · Cited by 63
Twin Delivery and Neonatal and Infant Mortality: A Population-Based Study
Zhang, J. (1996) · Obstetrics and Gynecology · doi:10.1016/0029-7844(96)00269-4 · Cited by 61
Birth weight discordance, intrauterine growth retardation and perinatal outcomes in twins.
Fraser, D., Picard, R., Picard, E., et al. (1994) · PubMed · Cited by 60
Fetal and infant death in mono- and dizygotic twins in England and Wales 1982–91
West, C., Adi, Y., & Pharoah, P. O. D. (1999) · Archives of Disease in Childhood Fetal & Neonatal · doi:10.1136/fn.80.3.f217 · Cited by 49
Outcome of Twin Pregnancies According to Intrapair Birth Weight Differences
Hollier, L. M., McIntire, D. D., & Leveno, K. J. (1999) · Obstetrics and Gynecology · doi:10.1097/00006250-199912000-00019 · Cited by 35
Wj, M., Wf, O., Knuppel, R. A., et al. (1989) · PubMed · Cited by 34
Kontopoulos, E., Ananth, C., Smulian, J., et al. (2004) · The Journal of Maternal-Fetal & Neonatal Medicine · doi:10.1080/14767050410001668707 · Cited by 30
Self-citationPregnancy with stillbirth of both twins
Rydhstroem, H. (1996) · BJOG An International Journal of Obstetrics & Gynaecology · doi:10.1111/j.1471-0528.1996.tb09511.x · Cited by 26
Intertwin birth weight discordance as a potential adaptive measure to promote gestational age.
Blickstein, I., & Goldman, R. D. (2003) · PubMed · Cited by 24
Adaptive Growth Restriction as a Pattern of Birth Weight Discordance in Twin Gestations
Blickstein, I., Goldman, R. D., & Mazkereth, R. (2000) · Obstetrics and Gynecology · doi:10.1097/00006250-200012000-00022 · Cited by 17
Flagged first, then by citations
Cited by
Sorted by citations
Prins, T. J., Min, A. M., Gilder, M. E., Tun, N. W., Schepens, J., McGregor, K., Carrara, V. I., Wiladphaingern, J., Paw, M. K., Moo, E., et al. (2024) · PLoS ONE · doi:10.1371/journal.pone.0301222 · Cited by 8
Metadata
- Authors
- Kontopoulos, E. V., Ananth, C. V., Smulian, J. C., & Vintzileos, A. M.
- Affiliations
- Robert Wood Johnson University Hospital (US)
- Rutgers, The State University of New Jersey (US)
- Venue
- American Journal of Obstetrics and Gynecology
- Publisher
- Elsevier BV
- Published
- 2005-01
- Volume
- 192
- Issue
- 1
- Pages
- 252-256
- ISSN
- 0002-9378 (ISSN-L)
- OpenAlex
- W2094523446
- Cited by
- 35
- References
- 32
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2022: 3 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 2 · 2013: 1 · 2012: 1
- FWCI
- 1.45
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- American Journal of Obstetrics and Gynecology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD038902)
- Topics
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Assisted Reproductive Technology and Twin Pregnancy
- Health Sciences › Medicine › Obstetrics and Gynecology › Maternal and Perinatal Health Interventions
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Maternal and Neonatal Healthcare
- Keywords
- mode of delivery, cesarean section, vaginal delivery, birth weight discordance, discordant twins, multiple births
- MeSH terms
- Adult, Birth Weight, Cesarean Section, Female, Humans, Infant Mortality, Infant, Newborn, Pregnancy, Risk Factors, Twins, United States, Logistic Models, Databases, Factual, Delivery, Obstetric
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
