958: Delivering equity: preterm birth rates by socioeconomic status before and after Medicaid coverage of 17-OHP

BACKGROUND: Early life events may have long term consequences on respiratory health including the risk of developing asthma.OBJECTIVE: To examine the independent roles of birthweight and preterm birth on childhood asthma after accounting for socioeconomic status.METHODS: A total of 989 elementary school children performed spirometry before and after a free-running exercise challenge. A subsample of 327 children underwent methacholine bronchoprovocation and allergy skin prick tests to common inhaled aeroallergens. Information on birthweight and preterm birth was obtained by parental interview. Socioeconomic status was established using parental occupation.RESULTS: After adjusting for the effects of important confounding variables, birthweight was positively associated with forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1); FVC increased 4.5% per kg (95% CI 1.7 to 7.4) and FEV14.4% per kg (95% CI 1.8 to 7.2). Birthweight was not related to exercise-induced bronchospasm or an asthma diagnosis, but airway responsiveness to methacholine increased as birthweight decreased (P=0.01). Preterm birth independent of birthweight was associated with a lower FEV1/FVC (-1.7%; 95% CI -2.8 to -0.5).CONCLUSIONS: Birthweight appears to be related to lung size and methacholine responsiveness while preterm birth appears to diminish airway size.

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Preventing early births in a regional tertiary maternity unit: Evaluating preterm and early term birth rates before and after implementation of the Preterm Birth Prevention Initiative in the Australian Capital Territory

Australian and New Zealand Journal of Obstetrics and Gynaecology ◽

10.1111/ajo.13328 ◽

2021 ◽

Author(s):

Roberto Orefice ◽

Julia Smythe ◽

Dorota A. Doherty ◽

Boon Lim

Keyword(s):

Preterm Birth ◽

Maternity Unit ◽

Australian Capital Territory ◽

Birth Rates ◽

Term Birth ◽

Early Term ◽

Australian Capital ◽

Before And After

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Validity of pre and post-term birth rates based on the date of last menstrual period compared to early obstetric ultrasonography

Cadernos de Saúde Pública ◽

10.1590/0102-311x00121514 ◽

2015 ◽

Vol 31 (4) ◽

pp. 885-890 ◽

Cited By ~ 2

Author(s):

Maria Nilza Lima Medeiros ◽

Nádia Carenina Nunes Cavalcante ◽

Fabrício José Alencar Mesquita ◽

Rosângela Lucena Fernandes Batista ◽

Vanda Maria Ferreira Simões ◽

...

Keyword(s):

Preterm Birth ◽

Positive Predictive Value ◽

Predictive Value ◽

Birth Rate ◽

Menstrual Period ◽

Last Menstrual Period ◽

Birth Rates ◽

Term Birth ◽

Preterm Birth Rate ◽

Obstetric Ultrasonography

The aim of this study was to assess the validity of the last menstrual period (LMP) estimate in determining pre and post-term birth rates, in a prenatal cohort from two Brazilian cities, São Luís and Ribeirão Preto. Pregnant women with a single fetus and less than 20 weeks' gestation by obstetric ultrasonography who received prenatal care in 2010 and 2011 were included. The LMP was obtained on two occasions (at 22-25 weeks gestation and after birth). The sensitivity of LMP obtained prenatally to estimate the preterm birth rate was 65.6% in São Luís and 78.7% in Ribeirão Preto and the positive predictive value was 57.3% in São Luís and 73.3% in Ribeirão Preto. LMP errors in identifying preterm birth were lower in the more developed city, Ribeirão Preto. The sensitivity and positive predictive value of LMP for the estimate of the post-term birth rate was very low and tended to overestimate it. LMP can be used with some errors to identify the preterm birth rate when obstetric ultrasonography is not available, but is not suitable for predicting post-term birth.

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