A Revised Birth Weight Reference for the United States

Duryea, Elaine L.; Hawkins, J. Seth; McIntire, Donald D.; Casey, Brian M.; Leveno, Kenneth J.

doi:10.1097/aog.0000000000000345

Cited by 190 publications

(148 citation statements)

References 11 publications

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“…Maternal outcomes included: maternal ICU stay during the delivery hospitalization, clinically determined estimated blood loss (EBL), number of units of packed red cells transfused, units of fresh frozen plasma transfused, units of cryoprecipitate transfused, units of platelets transfused, significant hypotension (defined as systolic blood pressure <80 mm Hg or diastolic blood pressure of <50 mm Hg on at least two occasions at least 30 minutes apart), significant tachycardia (defined as maternal pulse >120 beats per minute at any time for any duration after delivery), maternal ventilatory support, any unanticipated additional maternal surgical procedures (including repair of other organs and hysterectomy), and length of stay. Neonatal outcomes recorded included gestational age at delivery, need for ventilatory support within 24 hours of birth, size for gestational age (small [<10 th percentile], appropriate, large [>90 th percentile]) per methods of Duryea et al, 8 and length of neonatal stay. Because we only had data through the delivery hospitalization, complications or surgeries that occurred after delivery hospitalization discharge were not obtained.…”

Section: Methodsmentioning

confidence: 99%

Morbidly Adherent Placenta Treatments and Outcomes

Bailit

Grobman

Rice

et al. 2015

Obstetrics &Amp; Gynecology

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268

194

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Objective To describe recent maternal and neonatal delivery outcomes among women with a morbidly adherent placenta in major centers across the United States. Methods This study reviewed a cohort of 115,502 women and their neonates born in 25 hospitals in the United States between March 2008 and February 2011 from the Assessment of Perinatal EXcellence data set. All cases of morbidly adherent placenta were identified. Maternal demographics, procedures undertaken and maternal and neonatal outcomes were analyzed. Results There were 158 women with a morbidly adherent placenta (1 per 731 births [95%CI: 1 per 632, 1 per 866]). Eighteen percent of women with a morbidly adherent placenta were nulliparous and 37% had no prior cesarean delivery. Only 53% (84/158) were suspected to have a morbidly adherent placenta before delivery. Women with a prenatally suspected morbidly adherent placenta experienced large blood loss (33%), hysterectomy (92%) and intensive care unit admission (39%) compared with 19%, 45% and 22%, respectively, in those not suspected to have a morbidly adherent placenta(p<.05 for all). Conclusion Eighteen percent of women with a morbidly adherent placenta were nulliparous. Half of the morbidly adherent placenta cases were suspected before delivery and outcomes were poorer in this group, probably because the more clinically significant morbidly adherent placentas are more likely to be suspected before delivery.

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Section: Methodsmentioning

confidence: 99%

Morbidly Adherent Placenta Treatments and Outcomes

Bailit

Grobman

Rice

et al. 2015

Obstetrics &Amp; Gynecology

Self Cite

268

194

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“…Newborns were classified as large-for-gestational age if birth weight was greater than or equal to 90% (LGA, ≥90 th percentile for birth weight), small-for-gestational age if birth weight was less than 10% (SGA, <10 th percentile for birth weight), 13 , and macrosomic if birth weight was equal or greater than 4000 g. Estimated fetal weight (EFW) was calculated using the Hadlock formula that incorporates HC, AC, and FL 14 . Newborns were classified as idiopathic fetal growth restriction (FGR) if their EFW was below 10%.…”

Section: Methodsmentioning

confidence: 99%

Association of Maternal Obesity With Longitudinal Ultrasonographic Measures of Fetal Growth

et al. 2018

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IMPORTANCE Despite the increasing prevalence of pregravid obesity, systematic evaluation of the association of maternal obesity with fetal growth trajectories is lacking.OBJECTIVE To characterize differences in fetal growth trajectories between obese and nonobese pregnant women, and to identify the timing of any observed differences. DESIGN, SETTING, AND PARTICIPANTSThe Eunice Kennedy Shriver National Institute of Child Health and Human Development Fetal Growth Studies-Singletons study enrolled cohorts of pregnant women at 12 US health care institutions. Obese women (with prepregnancy body mass index > 30) and nonobese women (prepregnancy body mass indexes, 19-29.9) without major chronic diseases were recruited between 8 weeks and 0 days' gestation and 13 weeks and 6 days' gestation. A mixed longitudinal randomization scheme randomized participants into 1 of 4 schedules for 2-dimensional and 3-dimensional ultrasonograms to capture weekly fetal growth data throughout the remainder of their pregnancies. MAIN OUTCOMES AND MEASURESOn each ultrasonogram, fetal humerus length, femur length, biparietal diameter, head circumference, and abdominal circumference were measured. Fetal growth curves were estimated using linear mixed models with cubic splines. Median differences in the fetal measures at each gestational week of the obese and nonobese participants were examined using the likelihood ratio and Wald tests after adjustment for maternal characteristics. RESULTSThe study enrolled 468 obese and 2334 nonobese women between 8 weeks and 0 days' gestation and 13 weeks and 6 days' gestation. After a priori exclusion criteria, 443 obese and 2320 nonobese women composed the final cohort. Commencing at 21 weeks' gestation, femur length and humerus length were significantly longer for fetuses of obese woman than those of nonobese women. Differences persisted in obese and nonobese groups through 38 weeks' gestation (median femur length, 71.0 vs 70.2 mm; P = .01; median humerus length, 62.2 vs 61.6 mm; P = .03). Averaged across gestation, head circumference was significantly larger in fetuses of obese women than those of nonobese women (P = .02). Fetal abdominal circumference was not greater in the obese cohort than in the nonobese cohort but was significantly larger than in fetuses of normal-weight women (with body mass indexes between 19.0-24.9) commencing at 32 weeks (median, 282.1 vs 280.2 mm; P = .04). Starting from 30 weeks' gestation, estimated fetal weight was significantly larger for the fetuses of obese women (median, 1512 g [95% CI, 1494-1530 g] vs 1492 g [95% CI, 1484-1499 g]) and the difference grew as gestational age increased. Birth weight was higher by almost 100 g in neonates born to obese women than to nonobese women (mean, 3373.2 vs 3279.5 g). CONCLUSIONS AND RELEVANCEAs early as 32 weeks' gestation, fetuses of obese women had higher weights than fetuses of nonobese women. The mechanisms and long-term health implications of these findings are not yet established.

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“…Infants less than the 10th percentile for gestational age according to 2011 US birth weight references were classified as small for gestational age. 25 …”

Section: Methodsmentioning

confidence: 99%

Male Sex Associated With Increased Risk of Neonatal Abstinence Syndrome

Charles

Cooper

Jansson

et al. 2017

Hospital Pediatrics

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BACKGROUND Neonatal abstinence syndrome (NAS) is a postnatal opioid withdrawal syndrome. Factors associated with development of the syndrome are poorly understood; however, infant sex may influence the risk of NAS. Our objective was to determine if infant sex was associated with the development or severity of the syndrome in a large population-based cohort. METHODS This retrospective cohort study used vital statistics and prescription, outpatient, and inpatient administrative data for mothers and infants enrolled in the Tennessee Medicaid program between 2009 and 2011. Multivariable logistic regression models were used to evaluate the association between male sex and diagnosis of NAS, accounting for potential demographic and clinical confounders. NAS severity, as evidenced by hospital length of stay, was modeled by using negative binomial regression. RESULTS Of 102 695 infants, 927 infants were diagnosed with NAS (484 male subjects and 443 female subjects). Adjustments were made for the following: maternal age, race, and education; maternal hepatitis C infection, anxiety, or depression; in utero exposure to selective serotonin reuptake inhibitors and cigarettes; infant birth weight, small for gestational age, and year; and the interaction between opioid type and opioid amount. Male infants were more likely than female infants to be diagnosed with NAS (adjusted odds ratio, 1.18 [95% confidence interval, 1.05–1.33]) and NAS requiring treatment (adjusted odds ratio, 1.24 [95% confidence interval, 1.04–1.47]). However, there was no sex-based difference in severity for those diagnosed with NAS. CONCLUSIONS Treatment of NAS should be tailored to an infant’s individual risk for the syndrome. Clinicians should be mindful that male sex is an important risk factor in the diagnosis of NAS.

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A Revised Birth Weight Reference for the United States

Abstract: : II.

Cited by 190 publications

References 11 publications

Morbidly Adherent Placenta Treatments and Outcomes

Morbidly Adherent Placenta Treatments and Outcomes

Association of Maternal Obesity With Longitudinal Ultrasonographic Measures of Fetal Growth

Male Sex Associated With Increased Risk of Neonatal Abstinence Syndrome

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