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Good Positive and Negative Likelihood Ratios

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Influenza A H1N1 : Likelihood Ratios

Introduction: None written.

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Prevalence

Population / Calculator	Prevalence	Comments / Study / Link
	81%
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The likelihood ratios of findings for Influenza A H1N1 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.)

Good Positive and Negative Likelihood Ratios
Finding	Result	+LR	-LR
[ + ] Luminex xTAG Respiratory Virus Panel	+ 0 -	inf	0
Study: Evaluation of multiple test methods for the detection of the novel 2009 influenza A (H1N1) during the New York City outbreak. Ginocchio CC, Zhang F, Manji R, Arora S, Bornfreund M, Falk L, Lotlikar M, Kowerska M, Becker G, Korologos D, de Geronimo M, Crawford JM. J Clin Virol. 2009 Jul;45(3):191-5. Epub 2009 Jun 16.
[ + ] R-Mix Culture	+ 0 -	inf	0.1
Study: Evaluation of multiple test methods for the detection of the novel 2009 influenza A (H1N1) during the New York City outbreak. Ginocchio CC, Zhang F, Manji R, Arora S, Bornfreund M, Falk L, Lotlikar M, Kowerska M, Becker G, Korologos D, de Geronimo M, Crawford JM. J Clin Virol. 2009 Jul;45(3):191-5. Epub 2009 Jun 16.

Good Positive Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] DFA Swab	+ 0 -	8.5	0.6
Study: Evaluation of multiple test methods for the detection of the novel 2009 influenza A (H1N1) during the New York City outbreak. Ginocchio CC, Zhang F, Manji R, Arora S, Bornfreund M, Falk L, Lotlikar M, Kowerska M, Becker G, Korologos D, de Geronimo M, Crawford JM. J Clin Virol. 2009 Jul;45(3):191-5. Epub 2009 Jun 16.
[ + ] 3M Rapid Detection Flu	+ 0 -	2.8	0.9
Study: Evaluation of multiple test methods for the detection of the novel 2009 influenza A (H1N1) during the New York City outbreak. Ginocchio CC, Zhang F, Manji R, Arora S, Bornfreund M, Falk L, Lotlikar M, Kowerska M, Becker G, Korologos D, de Geronimo M, Crawford JM. J Clin Virol. 2009 Jul;45(3):191-5. Epub 2009 Jun 16.

Findings With Unspecified Accuracy
Finding	Result	+LR	-LR
[ + ] Cough		No accuracy specified.
Study: no study specified.