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Sensitive and Specific Findings

Poorly Diagnostic Findings

Henoch-Schonlein Purpura: Sensitivity and Specificity

Introduction: an autoimmune vasculitis affecting primarily children, classically presenting with: palpable purpura, abdominal pain, renal failure, and arthritis.

The purpura classically present on the lower extremities and buttocks.

[Edit Diagnosis] [Merge dx] [Add prevalence]

Tags: Autoimmune Pediatrics Renal Vasculitis Tag this Diagnosis.

The sensitivity and specificity of findings for Henoch-Schonlein Purpura 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.)
Sensitive and Specific Findings
FindingResult SensitivitySpecificity
[ + ] ACR Criteria + 0 - 87.1%87.7%
Poorly Diagnostic Findings
FindingResult SensitivitySpecificity
[ + ] Arthritis Sensitivity = 75%
[ + ] Upper Respiratory Tract Infection Sensitivity = 50%