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Pyelonephritis: Likelihood Ratios

Introduction: Acute Pyelonephritis is usually defined as a UTI plus fever. However, according to the one study that everyone cites (see below), this is simply untrue.

Other diagnostic findings are leukocytosis, CVAT or flank pain, and WBC casts in the urine.

See also Urinary Tract Infection, which has many related diagnostic findings, including CVAT and flank pain.

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Tags: Infection Tag this Diagnosis.

Differential Diagnoses include: Urinary Tract Infection

The likelihood ratios of findings for Pyelonephritis 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 Likelihood Ratio
FindingResult +LR-LR
[ + ] hearing loss + 0 - 4.70.6
Poorly Diagnostic Findings
FindingResult +LR-LR
[ + ] Blood Cultures Sensitivity = 11%
Findings With Unspecified Accuracy
FindingResult +LR-LR
[ + ] White Cell Cast No accuracy specified.
[ + ] Abdominal CT No accuracy specified.