Post Traumatic Stress Disorder: Likelihood Ratios

Introduction: None written.

The likelihood ratios of findings for Post Traumatic Stress Disorder 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
[ + ] GAD7 >= 8	+ 0 -	3	0.3
Study: Spoont, M. R., Williams, J. W., Kehle-Forbes, S., Nieuwsma, J. A., Mann-Wrobel, M. C., & Gross, R. (2015). Does This Patient Have Posttraumatic Stress Disorder? JAMA, 314(5), 501. doi:10.1001/jama.2015.7877