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Good Positive Likelihood Ratio

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Successful Induction of Labor: Likelihood Ratios

Introduction: Ability to induce labor with pitocin leading to vaginal delivery, vs needing a cervical ripening agent or having to perform C-section.

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Tags: Obstetrical Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Women in Labor, single gestation cephalic 77.8% Clin Obstet Gynecol. 2006 Sep;49(3):573-84. PMID: 16885664
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The likelihood ratios of findings for Successful Induction of Labor are listed below. See the left navigation bar to change the display.

Good Positive Likelihood Ratio

Finding +LR-LR Comments, Study
Bishop Score Edit 2.10.7

Bishop Score >= 5 (varying cutoffs used historically):

position 0-2

consistency 0-2

effacement 0-3

dilation 0-3

station 0-3

See e.g. http://www.fpnotebook.com/OB/Exam/BshpScr.htm for details.

Study: Clin Obstet Gynecol. 2006 Sep;49(3):573-84. PMID: 16885664

Poorly Diagnostic Findings

Finding +LR-LR Comments, Study
Transvaginal US Edit 1.90.6

cervical length <=20mm

Study: Clin Obstet Gynecol. 2006 Sep;49(3):573-84. PMID: 16885664

Fetal Fibronectin Edit 1.60.6

Study: Clin Obstet Gynecol. 2006 Sep;49(3):573-84. PMID: 16885664