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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Prevalence

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	Sensitivity	Specificity	Comments, Study
Cervical Length Duplicate	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	Sensitivity	Specificity	Comments, Study
Cervical Length Duplicate	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