Acute Otitis Media: Likelihood Ratios

Introduction: None written.

Prevalence

Population / Calculator	Prevalence	Comments / Study / Link
Children 0-2 years visiting a pediatrician	17.4%	JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
Children 2-5 years visiting a pediatrician	18.1%	JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
Children 6-10 years visiting a pediatrician	10.5%	JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
More, Edit...

The likelihood ratios of findings for Acute Otitis Media 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.)

History
Finding	Result	+LR	-LR
[ + ] Cough	+ 0 -	0.9	1.2
another study had different sens/spec but similar LRs (1.0) Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123

Physical Exam
Finding	Result	+LR	-LR
[ + ] hearing loss	+ 0 -	0.8	1.3
another study had different sens/spec but similar LRs Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123

Renal
Finding	Result	+LR	-LR
[ + ] hearing loss	+ 0 -	0.8	1.3
another study had different sens/spec but similar LRs Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123

Vital Signs
Finding	Result	+LR	-LR
[ + ] hearing loss	+ 0 -	0.8	1.3
another study had different sens/spec but similar LRs Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123

Untagged
Finding	Result	+LR	-LR
[ + ] Bulging Tympanic Membrane	+ 0 -	20	0.4
PLR for retracted TM is 1.3 Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Cloudy Tympanic Membrane	+ 0 -	11	0.1
PLR for "distinctly red" TM = 2.6 Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Ear Pain	+ 0 -	4.4	0.5
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Ear Rubbing	+ 0 -	3.2	0.7
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Excessive Crying	+ 0 -	1.8	0.7
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Immobile Tympanic Membrane	+ 0 -	8.4	0
"distinctly immobile" PLR for slightly impaired mobility = 1.1 Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Parental Diagnosis	+ 0 -	3.5	0.4
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Poor Appetite	+ 0 -	1.1	1
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Restless Sleep	+ 0 -	1.3	0.7
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Rhinitis	+ 0 -	1.3	0.6
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123
[ + ] Upper Respiratory Tract Infection	+ 0 -	1.4	0.1
Study: JAMA. 2003 Sep 24;290(12):1633-40. PMID: 14506123