Sarcoma, Primary: Likelihood Ratios

Introduction: None written.

Prevalence

Prevalance for retroperitoneal sarcomas

Retroperitoneal sarcoma: a population-based analysis of epidemiology, surgery, and radiotherapy.

Porter GA; Baxter NN; Pisters PW

Cancer. 2006 Apr 1;106(7):1610-6.

The likelihood ratios of findings for Sarcoma, Primary 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
Finding	Result	+LR	-LR
[ + ] PET/CT scan	+ 0 -	7.6	0.1
Study: http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1421009 Clinical value of [18-F]] fluorodeoxyglucose positron emission tomography imaging in soft tissue sarcomas. Schwarzbach MH; Dimitrakopoulou-Strauss A; Willeke F; Hinz U; Strauss LG; Zhang YM; Mechtersheimer G; Attigah N; Lehnert T; Herfarth C Ann Surg 2000 Mar;231(3):380-6.