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Good Positive and Negative Likelihood Ratios

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Peripheral Arterial Disease: Likelihood Ratios

Introduction: None written.

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Tags: Vascular Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Symptomatic adults age 60-80 15% JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619
Asymptomatic Adults, age 60-69 5% JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619
More populations 0% see table 5 in JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619
More, Edit...

The likelihood ratios of findings for Peripheral Arterial Disease are listed below. See the left navigation bar to change the display.

Good Positive and Negative Likelihood Ratios

Finding +LR-LR Comments, Study
Skin Discoloration Edit 2.80

symptomatic patients

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Ankle-Brachial Index Edit inf0.1

Threshold < 0.9

With the patient lying supine, a sphygmomanometer cuff, placed 2 to 3 cm above the point of pulse measurement, is inflated above the systolic pressure. As the cuff pressure is slowly released, a handheld Doppler is used for obtaining the systolic pressure at the right and left ankle (either dorsalis pedis artery, posterior tibial artery, or both) and the right and left brachial artery. The systolic pressure is that pressure where the Doppler signal returns.

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

CT angiography Edit 23.80.1

most of data from patients with intermittent claudication

Study: JAMA. 2009;301(4):415-424. http://jama.ama-assn.org/cgi/content/short/301/4/415

Peripheral Artery Disease Score Edit 7.80.2

< 6 of the following in asymptomatic patients:

The number of auscultated components (right posterior tibial artery + left posterior tibial artery; range of 0 for none heard to 3 for normal for each artery)

plus

The grade of palpated posterior tibial artery (right posterior tibial artery + left posterior tibial artery; 2 for normal, 1 for palpated but abnormal, 0 for not palpable for each artery)

plus

A history of myocardial infarction (1 for none, 0 for prior myocardial infarction)

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Palpable Pulse Abnormality
Duplicate Edit
4.70.4

"any palpable pulse abnormality", in symptomatic patients

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Palpable Pulse Abnormality
Duplicate Edit
30.4

"any palpable pulse abnormality", in a screening population

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Good Positive Likelihood Ratio

Finding +LR-LR Comments, Study
Skin Wounds Edit inf1

in symptomatic patients

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Femoral Bruit
Duplicate Edit
60.7

in symptomatic patients

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Femoral Bruit
Duplicate Edit
4.80.8

in a screening population

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Skin Temperature Edit 4.50.9

i.e. cooler to touch, in symptomatic patients

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Intermittent Claudication Edit 30.9

reproducible leg pain that occurs with exercise, does not occur at rest, and is relieved within 10 minutes of rest

(in a screening population)

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619

Poorly Diagnostic Findings

Finding +LR-LR Comments, Study
Capillary refill time Edit 1.90.8

abnormal. For moderate-severe PAD. In symptomatic patients.

Study: JAMA. 2006 Feb 1;295(5):536-46. PMID: 16449619