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Good Positive and Negative Likelihood Ratios

Findings With Unspecified Accuracy

Premature Rupture of Membranes: Likelihood Ratios

Introduction: None written.

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The likelihood ratios of findings for Premature Rupture of Membranes are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %.	Post-Test Probability (Predictive Value): %.	Switch to display mode.
Note that calculating probabilities from more than one** finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)

Findings With Unspecified Accuracy
Finding	Result	+LR	-LR
[ + ] History		No accuracy specified.
"history has an accuracy of 90%" (unable to get original study since it's so old) Patients may describe either a gush of fluid or a slow trickle Study: Clin Obstet Gynecol. 1991 Dec;34(4):715-22 PMID: 1778013