GetTheDiagnosis.org

Welcome, guest.
Login or Sign up to edit.

Add an entry

Search:
 

Tools

Add a finding for this diagnosis

Add prevalence for this diagnosis

Switch to calculator mode to see positive predictive value

Switch to sensitivity and specificity

Sort findings by Accuracy

Sort findings by Differential Diagnosis

Jump To

Blood Test

History

Imaging

Physical Exam

Renal

Vital Signs

Untagged

Appendicitis: Likelihood Ratios

Introduction: RLQ pain

nausea

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

Tags: Gastrointestinal Problem Infection Physical Exam Tag this Diagnosis.

Differential Diagnoses include: Urinary Tract Infection

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Adults >60 years old, abdominal pain in the ED 4% http://jama.ama-assn.org/cgi/content/abstract/276/19/1589
Adults, abdominal pain in ambulatory setting 1% http://jama.ama-assn.org/cgi/content/abstract/276/19/1589
Adults <60 years old, abdominal pain in ED 25% http://jama.ama-assn.org/cgi/content/abstract/276/19/1589
More, Edit...

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

Blood Test

Finding +LR-LR Comments, Study
Leukocytosis Edit 1.60.5

>10k

Study: Acad Emerg Med. 2004 Oct;11(10):1021-7. PMID: 15466143

History

Finding +LR-LR Comments, Study
Anorexia Edit 1.10.9

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Emesis Edit 0.91.1

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Migration of Pain Edit 3.60.4

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

No similar pain previously Edit 1.40.5

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Pain preceeding vomiting Edit 2.80

Based on only one study

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

RLQ Pain
Duplicate Edit
1.70.4

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

RLQ Pain
Duplicate Edit
No accuracy specified.

Differential Diagnosis: Urinary Tract Infection

Study: no study specified.

Imaging

Finding +LR-LR Comments, Study
Abdominal CT Edit 18.80.1

Usually radiologists like the CTs to be done with rectal contrast. However, there may not be a sensitivity difference between with and without contrast; see PMID: 17456874, PMID: 16105539, though other studies disagree PMID: 17566826.

Study: Ann Intern Med 2004 Oct 5;141(7):537-46. PMID 15466771

Abdominal US Edit 4.50.2

Study: Ann Intern Med 2004 Oct 5;141(7):537-46. PMID 15466771

Physical Exam

Finding +LR-LR Comments, Study
Abdominal Rigidity Edit 1.60.9

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Guarding Edit 1.70.5

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

hearing loss
Duplicate Edit
3.20.4

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

hearing loss
Duplicate Edit
1.30.8

>99F

Study: Acad Emerg Med. 2004 Oct;11(10):1021-7. PMID: 15466143

Obturator sign Edit No accuracy specified.

Passively flex the right leg at the hip and knee and internally rotate the leg at the hip.

Study: No studies but thought to be equivalent to psoas sign in accuracy.

Psoas sign Edit 3.20.9

With the patient in the supine position, ask the patient to lift the right thigh against your hand placed just above the knee. With the patient in left lateral decubitus position, extend the right leg at the hip.

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Rebound Edit 20.5

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Rectal tenderness Edit 1.80.8

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

Rovsing's Sign Edit No accuracy specified.

palpation of the lower left quadrant of a person's abdomen results in more pain in the right lower quadrant

Study: no study specified.

Renal

Finding +LR-LR Comments, Study
hearing loss
Duplicate Edit
3.20.4

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

hearing loss
Duplicate Edit
1.30.8

>99F

Study: Acad Emerg Med. 2004 Oct;11(10):1021-7. PMID: 15466143

Vital Signs

Finding +LR-LR Comments, Study
hearing loss
Duplicate Edit
3.20.4

Study: JAMA. 1996;276(19):1589-1594

http://jama.ama-assn.org/cgi/content/abstract/276/19/1589

hearing loss
Duplicate Edit
1.30.8

>99F

Study: Acad Emerg Med. 2004 Oct;11(10):1021-7. PMID: 15466143

Untagged

Finding +LR-LR Comments, Study
Appendicolith Edit 4.60.4

By CT. In children

Study: AJR Am J Roentgenol. 2000 Oct;175(4):981-4. PMID: 11000148