New Intrauterine Growth Curves Based on United States Data

Olsen, Irene E.; Groveman, Sue A.; Lawson, M. Louise; Clark, Reese H.; Zemel, Babette S.

doi:10.1542/peds.2009-0913

Cited by 769 publications

(675 citation statements)

References 40 publications

(36 reference statements)

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“…We performed a prospective neonatal cross-sectional study that allowed us to obtain an accurate assessment of GA and HC. Despite its limitations, this is one of the most widelyaccepted methods used to create growth curves that are aimed at determining HC at birth and post-birth 15 . We studied the following two distinct population groups: families of lower socioeconomic status who were assisted by the public health care system in the Maternity Hospital of the Universidade Federal do Rio Grande do Norte, which is a reference hospital in Natal, Brazil, and families of higher socioeconomic status who were served by the private health care system.…”

Section: Discussionmentioning

confidence: 99%

Revisiting head circumference of Brazilian newborns in public and private maternity hospitals

Amorim

Melo

2017

Arq. Neuro-Psiquiatr.

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In newborns, measurements of head circumference (HC) provide an indirect method of estimating head growth during the intrauterine and neonatal periods and during the first years of life. Head size reflects the growth of the brain and has been associated with body size, brain malformations, or merely be familial factors 1 . Dobbing, in 1974 2 , emphasized that brain growth does not occur in a linear and symmetrical fashion but is, instead, characterized by periods of increased cell growth. The human brain experiences two growth spurts. The initial growth spurt occurs from 12 to 18 weeks of gestation and is characterized by neuronal multiplication. The second growth spurt begins at 28 weeks of gestation and extends through birth until the third year of life. This growth is considered the major period of growth of the brain. During these growth spurt phases, the brain is more vulnerable and susceptible to the presence of both internal and external factors that can affect brain and body growth. Davies 3 argued that HC is more influenced by genetic factors than by weight and height and that it is less susceptible to maternal factors, such as diabetes, multipara, prior abortions, hypertension, malnutrition, or placental anomalies.Several studies have investigated HC in newborns and infants and correlated them with maternal, placental, and fetal factors 4 . In fact, previous studies 5 have reported correlations between HC and other anthropometric measurements or gestational age (GA). Up until now, few research groups in Brazil have studied HC or its correlation with GA and gender 6 . Therefore, the aim of this study was to revisit newborn HC Universidade Federal do Rio Grande do Norte, Departamento de Pediatria, Programa de Pós-Graduação em Ciências da Saúde, Natal RN, Brasil. ABSTRACTObjective: To revisit the head circumference (HC) of newborns in public and private maternity hospitals; to correlate our findings with the gestational age, gender, and type of delivery; and build and validate graphs and curves. Methods: This was a prospective study performed on healthy newborns. Differences in HC were analyzed as a function of gestational age, gender, the healthcare system and the type of delivery.Smoothed percentile curves were created using the least mean squares method. Results: Of the included newborns, 697 were born in private maternity hospitals and 2,150 were born in public maternity hospitals. In all, 839 were born by vaginal delivery, and 1,311 were born by cesarean delivery. At 37 to 42 weeks of gestation, male newborns had a larger HC than females. Infants born in private maternity and those born by cesarean delivery had a larger HC. Conclusion: An important result of the present study is that our analyses allowed us to generate curves and statistically-validated graphs that can be used in clinical neonatal practice.Keywords: neonatal head circumference; gestational age; gender; public and private maternity; newborn. Importante consequência deste estudo foi que os resultados permitiram a criação de curvas e g...

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Section: Discussionmentioning

confidence: 99%

Revisiting head circumference of Brazilian newborns in public and private maternity hospitals

Amorim

Melo

2017

Arq. Neuro-Psiquiatr.

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“…Neonatal anthropometrics included HC and weight at birth. Fetal and neonatal HC percentiles were evaluated using a contemporary standard based on growth curves derived from a large, racially diverse US sample adjusted for gestational age and gender (40). Microcephaly was defined as birth HC ≤3rd percentile.…”

Section: Anthropometric Datamentioning

confidence: 99%

“…Small head size was defined as birth HC ≤10th percentile. SGA was defined as estimated fetal weight (intrauterine growth restriction) or birth weight ≤10th percentile using the Olsen standard (40). LBW was considered to be <2,500 g. Poor head growth and poor weight gain were defined as trajectory decreases over time in HC or weight z-score, respectively, >0.67 (equivalent to crossing two major percentile lines) from midgestation to birth using Olsen standards (40,41).…”

Section: Anthropometric Datamentioning

confidence: 99%

Microcephaly is associated with early adverse neurologic outcomes in hypoplastic left heart syndrome

et al. 2013

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Background: Hypoplastic left heart syndrome (HLHS) is associated with significant mortality and morbidity. Fetal head growth abnormalities have been identified in a subset of HLHS fetuses, but it is unclear whether specific patterns of maladaptive growth affect clinical outcomes. We hypothesized that poor fetal head growth is associated with an increased frequency of adverse clinical outcomes. Methods: We retrospectively examined a cohort of HLHS patients from midgestation to 1 y of age. Fetal and birth anthropometric measurements were analyzed using the Olsen standard, and clinical outcomes were obtained. results: A total of 104 HLHS patients were identified over a 12-y period; fetal data were available in 38 cases. HLHS neonates demonstrated a high incidence of microcephaly (12%), small head size (27%), and poor head growth (32%). Allcause mortality was 31% at 30 d and 43% at 1 y. Neurologic outcomes were observed in 12% of patients and were significantly increased with microcephaly (43 vs. 4%; P = 0.02). The average length of hospital stay following stage I palliation was 33.4 ± 33 d, correcting for early death. conclusion: In term nonsyndromic HLHS, fetal and neonatal microcephaly are associated with early adverse neurologic outcomes but not mortality.

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“…We used British charts from 1990 (29) as also used in many other studies, including the EPICURE study (16). More recent standards produced from the United States (30) are based on larger numbers, but their ethnic mix is different from that in the UK study and so they were not suitable. The infants included in the current study had been entered into a randomized trial examining the efficacy of high-frequency oscillation and conventional mechanical ventilation as modes of respiratory support for very prematurely born infants (31).…”

Section: Sga and Respiratory Morbiditymentioning

confidence: 99%

Respiratory morbidity at follow-up of small-for-gestational-age infants born very prematurely

Peacock

D'Costa

et al. 2012

Pediatr Res

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Background:The aim of this study was to determine whether small-for-gestational-age (sGA) infants born very prematurely had increased respiratory morbidity in the neonatal period and at follow-up. Methods: Data were examined from infants recruited into the United Kingdom Oscillation study (UKOs). Of the 797 infants who were born at <29 wk of gestational age, 174 infants were sGA. Overall, 92% were exposed to antenatal corticosteroids and 97% received surfactant; follow-up data at 22-28 mo were available for 367 infants. results: After adjustment for gestational age and sex, sGA infants had higher rates of supplementary oxygen dependency at 36 wk postmenstrual age (odds ratio (OR): 3.23; 95% confidence interval: 2.03, 5.13), pulmonary hemorrhage (OR: 3.07; 95% cI: 1.82, 5.18), death (OR: 3.32; 95% cI: 2.13, 5.17), and postnatal corticosteroid requirement (OR: 2.09; 95% cI: 1.35, 3.23). After adjustment for infant and respiratory morbidity risk factors, a lower mean birth weight z-score was associated with a higher prevalence of respiratory admissions (OR: 1.40; 95% cI: 1.03, 1.88 for 1 sD change in z-score), cough (OR: 1.28; 95% cI: 1.00, 1.65), and use of chest medicines (OR: 1.32; 95% cI: 1.01, 1.73). conclusion: sGA infants who were born very prematurely, despite routine use of antenatal corticosteroids and postnatal surfactant, had increased respiratory morbidity at follow-up, which was not due to poor neonatal outcome.

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New Intrauterine Growth Curves Based on United States Data

Cited by 769 publications

References 40 publications

Revisiting head circumference of Brazilian newborns in public and private maternity hospitals

Revisiting head circumference of Brazilian newborns in public and private maternity hospitals

Microcephaly is associated with early adverse neurologic outcomes in hypoplastic left heart syndrome

Respiratory morbidity at follow-up of small-for-gestational-age infants born very prematurely

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