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Good Positive and Negative Likelihood Ratios

Congenital Hip Dysplasia: Likelihood Ratios

Introduction: aka Developmental Hip Dysplasia. Screened on well child checks < 1 year of age.

>20% of affected children have a positive family history.

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Tags: Musculoskeletal Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
European ancestry 0.2% rare in African-Americans

Am Fam Physician. 1999 Jul;60(1):177-84, 187-8. PMID: 10414637

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The likelihood ratios of findings for Congenital Hip Dysplasia 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
[ + ] Limp + 0 - 13.60.1
[ + ] Hamstring Stretch Test + 0 - 5.90.1
[ + ] Trendelenburg Sign + 0 - 140.2
[ + ] Limited Hip Abduction in Flexion + 0 - 4.10.2
[ + ] Leg Length Discrepancy + 0 - 3.30.2
[ + ] Ortolani Maneuver + 0 - inf0.4
[ + ] Telescoping + 0 - 25.50.5
[ + ] Barlow Maneuver + 0 - 8.70.5