Health Indicator Report of Very Preterm Singleton Births
Prematurity increases the risk for infant morbidity and mortality. Infants born preterm are at greater risk of dying in the first month of life. Preterm infants may require intensive care at birth and are at higher risk of developmental disabilities and chronic illnesses throughout life. They are more likely to require special education services. Health care costs and length of hospital stay are higher for preterm infants. The more preterm an infant is born, the more severe the health problems are likely to be. There are many health, behavioral, socioeconomic, and environmental factors known to increase the risk of preterm birth. Therefore, it is useful to track preterm birth as part of an Environmental Public Health Tracking system. Infants from multiple births (twins, triplets, etc.), are more likely to be born preterm, so to separate the effect of multiple birth from other causes, the EPHT indicator for very preterm birth focuses on singleton births only.
NotesIn 2014, NCHS changed the standard for gestational period from the Last Menstrual Period (LMP) based gestational age to the Obstetric/clinical Estimate (OE) based gestational age. Obstetric/clinical Estimate (OE) based gestational age groups for U.S. data are available only for years 2007 and later. Refer to [http://www.cdc.gov/nchs/data/nvsr/nvsr64/nvsr64_05.pdf Measuring Gestational Age in Vital Statistics Data: Transitioning to the Obstetric Estimate] for more information. Confidence intervals are not available for the U.S. data.
- Birth Certificate Database, Office of Vital Statistics and Registry, New Jersey Department of Health
- Centers for Disease Control and Prevention, National Center for Health Statistics. Natality public-use data. CDC WONDER On-line Database accessed at [http://wonder.cdc.gov/natality.html]
Data Interpretation IssuesThe New Jersey Department of Health has been using the obstetric estimate (OE) to determine gestational age since 1989, while the National Center for Health Statistics (NCHS) had been calculating it using date of last menstrual period (LMP). In 2014, NCHS changed the standard for gestational period from the LMP-based gestational age to the OE-based gestational age. OE-based gestational age for U.S. data became available for years 2007 and later in February, 2016. Data in reports published prior to February, 2016 will not match data shown here. Refer to [http://www.cdc.gov/nchs/data/nvsr/nvsr64/nvsr64_05.pdf Measuring Gestational Age in Vital Statistics Data: Transitioning to the Obstetric Estimate] for more information.
DefinitionPercent of live born singleton infants born before 32 weeks of gestation based on obstetric estimate Preterm is synonymous with premature. Infants born before 37 weeks of pregnancy are considered preterm and those born before 32 weeks of pregnancy are considered very preterm. Infants born after 37 weeks of pregnancy are called full term. Most pregnancies last around 40 weeks. Singletons are births that are not twins, triplets, or higher order.
NumeratorNumber of live born singleton infants born before 32 weeks of gestation to resident mothers
DenominatorNumber of live singleton infants born to residents mothers
How Are We Doing?The percentage of singleton infants born very preterm (before 32 weeks of gestation) among New Jersey residents is 1.2%. Preterm delivery of singletons is more than three times as likely among Blacks as it is among Whites and Asians and twice as likely as it is among Hispanics. The rate varies from 0.7% to 1.8% across counties.
How Do We Compare With the U.S.?The preterm rate among singletons in New Jersey is the same as that of the U.S. as a whole.
What Is Being Done?The Division of Family Health Services in the New Jersey Department of Health administers programs to enhance the health, safety and well-being of families and communities in New Jersey. Several programs are aimed at improving children's health, including reducing infant mortality. [http://www.nj.gov/health/fhs]
Page Content Updated On 11/06/2017, Published on 11/06/2017