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Bulimia Nervosa: Likelihood Ratios

Introduction: Binging plus/minus purging.

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Tags: Psychiatric Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Young Adult Females 1% Int J Eat Disord. 2001 Nov;30(3):279-87. PMID: 11746287
500 10%
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The likelihood ratios of findings for Bulimia Nervosa 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
FindingResult +LR-LR
[ + ] Urine Sodium to Chloride Ratio + 0 - 10.40.5
Good Positive Likelihood Ratio
FindingResult +LR-LR
[ + ] Hypokalemia + 0 - inf0.8
[ + ] Abnormal Serum Chloride + 0 - inf0.9
[ + ] Fractional Excretion of Sodium + 0 - 7.40.7
Poorly Diagnostic Findings
FindingResult +LR-LR
[ + ] Abnormal Serum Bicarbonate + 0 - 1.60.9
[ + ] Elevated Serum Amylase Sensitivity = 45%

 

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