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Good Positive and Negative Likelihood Ratios

Good Positive Likelihood Ratio

Poorly Diagnostic Findings

Increased Intracranial Pressure: Likelihood Ratios

Introduction: It is contraindicated to perform a lumbar puncture on a patient with increased intracranial pressure because of the danger of herniation. The gold standard test for elevated ICP is CT scan.

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Tags: Neurologic Tag this Diagnosis.

The likelihood ratios of findings for Increased Intracranial Pressure are listed below. See the left navigation bar to change the display.

Good Positive and Negative Likelihood Ratios

Finding +LR-LR Comments, Study
Clinical diagnosis Edit 18.80

i.e. based on abnormal findings on history or physical exam

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

Papilledema
Duplicate Edit
4.70.2

by ophthalmologists viewing a picture of a stereoscopic view of a dilated eye

Study: J Fam Pract. 1991 Oct;33(4):381-6. PMID: 1919455

Altered Mental Status Edit 2.20.4

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

Papilledema
Duplicate Edit
3.80.5

by family practitioners viewing a picture of a stereoscopic view of a dilated eye

Study: J Fam Pract. 1991 Oct;33(4):381-6. PMID: 1919455

Good Positive Likelihood Ratio

Finding +LR-LR Comments, Study
Papilledema
Duplicate Edit
11.10.9

by emergency medicine residents in the ED

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

Focal Neurological Signs Edit 4.30.6

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

History of CNS Mass Edit 3.70.9

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

Poorly Diagnostic Findings

Finding +LR-LR Comments, Study
History of Head Trauma Edit 0.71

Within last 72 hours

(Note: NOT DIAGNOSTIC!)

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

History of Seizure Edit 1.40.9

Within last 72 hours

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

History of HIV Edit 1.21

HIV positivity

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758

Immunosuppressed Edit 1.60.8

gold standard is CT (? is LP contraindicated)

Study: Arch Intern Med. 1999 Dec 13-27;159(22):2681-5. PMID: 10597758