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Good Positive and Negative Likelihood Ratios

Good Positive Likelihood Ratio

Bacterial Overgrowth: Likelihood Ratios

Introduction: This is overgrowth of bacteria in the small bowel.

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Tags: Gastrointestinal Problem Tag this Diagnosis.

The likelihood ratios of findings for Bacterial Overgrowth 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
[ + ] Hydrogen Breath Test	+ 0 -	4.1	0.5
aka lactulose breath test Study: Digestion. 2000;61(3):165-71. PMID: 10773721

Good Positive Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] Xylose Breath Test	+ 0 -	3	0.7
i.e. 14C-D-xylose test Study: Digestion. 2000;61(3):165-71. PMID: 10773721