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Risk of Preterm Labor: Sensitivity and Specificity

Introduction: These tests are for prediction of likelihood of going into preterm labor. In other words, these patients are asymptomatic. For patients who are symptomatic, see Preterm Labor.

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Tags: Obstetrical Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Women in the U.S. 12% approximately... from March of Dimes numbers
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The sensitivity and specificity of findings for Risk of Preterm Labor are listed below. See the left navigation bar to change the display.

Specific Findings

Finding SensitivitySpecificity Comments, Study
Cervical Length
Duplicate Edit
19%98%

<25mm at 16-19wk, for birth <35wk

in women with h/o spon preterm birth

Study: JAMA 2001 Sep 19;286(11):1340-8. PMID 11560539

Poorly Diagnostic Findings

Finding SensitivitySpecificity Comments, Study
Cervical Length
Duplicate Edit
69%80%

shortest cervical length q2wk up to 24 weeks is <25mm, for birth <35 wk

in women with h/o spon preterm birth

Study: JAMA 2001 Sep 19;286(11):1340-8. PMID 11560539