Comparative accuracy of clinical estimate versus menstrual gestational age in computerized birth certificates

Mustafa, Ghulam; David, Richard J.

doi:10.1016/s0033-3549(04)50018-3

Cited by 84 publications

(23 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…33 However, if this information is underreported on the birth certificate, our results are conservative estimates of the true effect of these variables on the risk of infant death. Similarly, gestational age is reported less accurately than birth weight on the birth certificate, 8,34 and this difference in reporting accuracy could have affected our comparisons of the risk of low birth weight and prematurity on infant death. Finally, vital records data sets do not contain information about factors such as quality of prenatal care, quality of neonatal and postneonatal care, and community or environmental factors, any of which may affect the risk of infant death.…”

Section: Discussionmentioning

confidence: 99%

Ethnic Differences in Neonatal and Postneonatal Mortality

Hessol

Fuentes-Afflick

2005

Pediatrics

View full text Add to dashboard Cite

ABSTRACT. Objective. Ethnic disparities in infant mortality have been consistently documented in the United States, but these disparities are poorly understood. Although the infant mortality rate in the United States has fallen to record low rates, since 1971 the ethnic disparity between black and white infants has remained unchanged or increased. In 2001, the infant mortality rate among black infants was ϳ2.5 times higher than the rate among white and Hispanic infants. The objective of this study was to identify ethnic differences in neonatal and postneonatal mortality as well as the causes and risk factors among infants born in California.Methods. Secondary analysis was performed of 1 277 393 singleton infants live-born to black, Latina, and white women from the California linked birth-infant death certificate from 1995 to 1997. The dependent variables were infant death (defined as an infant who died in the first year of life [death <365 days]), neonatal death (death during the first 27 days of life), and postneonatal death (death between 28 and 364 days of life). Causespecific neonatal and postneonatal infant mortality rates (per 100 000 live births) were calculated for each ethnic group. 2 and exact test statistics were used to compare the distribution of maternal and infant characteristics and cause-of-death rates by maternal ethnicity. Logistic regression analysis was used to compute odds ratios (ORs) and 95% confidence intervals (CIs) to estimate the relationship between maternal ethnicity, maternal and infant factors, and risk of infant mortality.Results. In both the neonatal and postneonatal periods, black women had higher infant mortality rates than Latina or white women for conditions originating in the perinatal period (including respiratory distress syndrome) and symptoms, signs, and ill-defined conditions (including sudden infant death syndrome). After adjusting for maternal and infant characteristics, there were no significant ethnic differences for neonatal mortality. For postneonatal mortality, black women had a higher risk (OR: 1.25; 95% CI: 1.10-1.42) and Latina women had a lower risk (OR: 0.80; 95% CI: 0.71-0.89) compared with white women after adjusting for maternal and infant factors. In analyses of all ethnic groups combined, as well as ethnic-specific analyses, the strongest predictors of neonatal and postneonatal death were infant birth weight of <2499 g and gestational age of <33 weeks.Conclusions. Causes of infant mortality and risk factors for infant mortality differed by maternal ethnicity, indicating a need to tailor prevention and education efforts, especially during the postneonatal period. To achieve national infant mortality goals, health professionals and policy makers should continue to emphasize the importance of early and continuous prenatal care and develop new strategies to reduce the incidence of low birth weight and premature infants. Ethnic-specific approaches may be needed to further reduce infant mortality rates and achieve our national goal to eliminate ethnic dispar...

show abstract

Section: Discussionmentioning

confidence: 99%

Ethnic Differences in Neonatal and Postneonatal Mortality

Hessol

Fuentes-Afflick

2005

Pediatrics

View full text Add to dashboard Cite

show abstract

“…The deficiencies of LMP-based gestational age are well established. [20][21][22][23] Recently, Qin et al 24 used a simple method in which the CE of gestational age is substituted for LMP-based gestational age when the difference between the two estimates is greater than 2 weeks (LMP/CE method). They demonstrated that the LMP/CE method, when compared with other techniques, almost eliminated the second mode in the gestational age distribution.…”

Section: Methodsmentioning

confidence: 99%

Application of A global reference for fetal‐weight and birthweight percentiles in predicting infant mortality

Ding

Tian

Zhang

et al. 2013

BJOG

View full text Add to dashboard Cite

Objective To determine whether the recently published A global reference for fetal-weight and birthweight percentiles (Global Reference) improves small-(SGA), appropriate-(AGA), and large-for-gestational-age (LGA) definitions in predicting infant mortality.Design Population-based cohort study. Population Singleton births with birthweight >500 g born at 24-41 weeks of gestation.Methods We compared infant mortality rates of SGA, AGA, and LGA infants classified by three different references: the Global Reference; a commonly used birthweight reference; and Hadlock's ultrasound reference.Main outcome measures Infant mortality rates.Results Among 33 997 719 eligible liveborn singleton births, 25% of preterm and 9% of term infants were classified differently for SGA, AGA, and LGA by the Global Reference and the birthweight reference. The Global Reference indicated higher mortality rates in preterm SGA and preterm LGA infants than the birthweight reference. The mortality rate was considerably higher in infants classified as preterm SGA by the Global Reference but not by the birthweight reference, compared with the corresponding infants classified by the birthweight reference but not by the Global Reference (105.7 versus 12.9 per 1000, RR 8.17, 95% CI 7.38-9.06). Yet, the differences in mortality rates were much smaller in term infants than in preterm infants. Black infants had a particularly higher mortality rate than other races in AGA and LGA preterm and term infants.Conclusions In respect to the commonly used birthweight reference, the Global Reference increases the identification of infant deaths by improved classification of abnormal newborn size at birth, and these advantages were more obvious in preterm than in term infants.

show abstract

“…Gestational ages based on recall of last menstrual period (LMP), such as those employed here are often misestimated due to errors in recall, inter and intra individual variations in the menstrual cycle, bleeding in early pregnancy, and unrecognized miscarriage (David, 1980;Kramer et al, 1988;Mustafa and David, 2001;Platt et al, 2001;Savitz et al, 2002;Todros et al, 1991). The clinical estimates of gestational age are not based on a consistent set of evidence and are similarly flawed (Alexander et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…Most recent studies operationalize ''compromised'' births as small for gestational age (SGA) (Forbes and Smalls, 1983;Goldenberg et al, 1989;Lubchenco et al, 1963), or as low fetal growth ratio (LFGR) (Kramer et al, 1989;Steward and Moser, 2004), or both (Frisbie et al, 1996). These methods have been criticized, (a) because they all require ad hoc cut points to define the categories (Alshimmiri et al, 2003;Hellier and Goldstein, 1979;Kohn et al, 2000;Madani et al, 1995;Van der Veen, 1998;Yerushalmy, 1967), and (b) because gestational age is often poorly estimated (Alexander et al, 1995;David, 1980;Kramer et al, 1988;Mustafa and David, 2001;Platt et al, 2001;Savitz et al, 2002;Todros et al, 1991). Nevertheless, both birth weight and gestational age are considered to have an independent influence on birth outcomes and the majority of research in the last several decades has used both variables.…”

mentioning

confidence: 99%

Multiple mortality optima due to heterogeneity in the birth cohort: A continuous model of birth weight by gestational age‐specific infant mortality

Fang¹,

Stratton²,

Gage³

2007

American J Hum Biol

View full text Add to dashboard Cite

Birth weight and gestational age are both important predictors of infant survival. Covariate Density Defined mixture of logistic regressions (CDDmlr), a method that accounts for unobserved heterogeneity, has been applied to birth outcomes using birth weight alone. This paper investigates a CDDmlr model of birth outcomes that includes birth weight and gestational age. Applications to four birth cohorts, composed of all non-Hispanic singleton African/European American female/male live births in New York State from 1985-1988, are presented. Multiple birth weight by gestational age optimal (minimal) mortalities are observed in the birth weight by gestational age-specific mortality surface. Multiple optima have not been mentioned in the published literature, but they do appear in some published plots of birth weight by gestational age mortality. It is possible that misreporting of gestational age contributes to this phenomenon, but it cannot completely explain the locations of the local optima. The global optimum is associated with a "normal" fetal development subpopulation, while the local optima are due to a subpopulation that accounts for most low birth weight, intrauterine growth retarded, pre-term, post-term, and small for gestational age births, as well as, births with misestimated gestational ages. These two subpopulations have significantly different birth weight by gestational age-specific mortality surfaces. Consequently, the presence of multiple optima can be attributed to heterogeneity in the birth cohort. Comparisons of CDDmlr based on birth weight by gestational age and birth weight alone might statistically identify births with "erroneous" gestational age.

show abstract

Comparative accuracy of clinical estimate versus menstrual gestational age in computerized birth certificates

Cited by 84 publications

References 32 publications

Ethnic Differences in Neonatal and Postneonatal Mortality

Ethnic Differences in Neonatal and Postneonatal Mortality

Application of A global reference for fetal‐weight and birthweight percentiles in predicting infant mortality

Multiple mortality optima due to heterogeneity in the birth cohort: A continuous model of birth weight by gestational age‐specific infant mortality

Contact Info

Product

Resources

About