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Maternal C-reactive protein and preterm labor.

W G Dodds, J D Iams

    The Journal of Reproductive Medicine
    |July 1, 1987
    PubMed
    Summary

    Elevated maternal C-reactive protein (CRP) levels in pregnant women predict preterm delivery. A CRP of 0.8 mg/dL or higher identifies high-risk individuals in preterm labor, aiding clinical decisions.

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    Area of Science:

    • Obstetrics and Gynecology
    • Clinical Chemistry
    • Perinatal Medicine

    Background:

    • Preterm labor poses significant risks to maternal and infant health.
    • Accurate prediction of preterm delivery is crucial for timely intervention.
    • C-reactive protein (CRP) is a biomarker of inflammation, but its role in predicting preterm delivery requires further clarification.

    Purpose of the Study:

    • To investigate the correlation between maternal C-reactive protein (CRP) levels and the outcome of tocolysis in women with preterm labor.
    • To determine if CRP levels can predict the timing of delivery in women experiencing preterm labor.

    Main Methods:

    • Maternal CRP levels were measured in 109 pregnant women, categorized into preterm labor (before 35 weeks), term labor, and not in labor groups.
    • CRP values were analyzed for their correlation with tocolysis success and gestational age at delivery.
    • Sensitivity and specificity of CRP levels in predicting delivery within one week were calculated for women in preterm labor.

    Main Results:

    • In women with preterm labor, a maternal CRP level of ≥ 0.8 mg/dL demonstrated 85% sensitivity and 81% positive predictive value for delivery within one week.
    • A CRP level < 0.8 mg/dL showed 71% specificity in predicting delivery more than one week after tocolysis.
    • Elevated maternal CRP identified a subgroup of women in preterm labor at highest risk for imminent delivery.

    Conclusions:

    • Maternal CRP is a valuable biomarker for predicting imminent delivery in women experiencing preterm labor.
    • A threshold of 0.8 mg/dL for maternal CRP can effectively stratify risk in preterm labor patients.
    • These findings support the use of CRP measurement to guide clinical management and optimize tocolytic therapy in preterm labor.

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