Pelvic Inflammatory Disease: Likelihood Ratios

Introduction: Infection of the internal female genital organs.

50% from Chlamydia trachomatis. Others: Neisseria gonorrheae, mycoplasma, etc.

The likelihood ratios of findings for Pelvic Inflammatory Disease 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.)

History
Finding	Result	+LR	-LR
[ + ] Emesis	+ 0 -	1.2	1
Study: Sex Transm Infect. 2003 Dec;79(6):491-4. PMID: 14663128

Imaging
Finding	Result	+LR	-LR
[ + ] Abdominal MRI	+ 0 -	13.6	0.1
note: small series Study: J Infect. 2000 Jan;40(1):31-41. PMID: 10762109
[ + ] Abdominal US		Sensitivity = 78%
Study: J Infect. 2000 Jan;40(1):31-41. PMID: 10762109

Renal
Finding	Result	+LR	-LR
[ + ] hearing loss	+ 0 -	1.3	0.8
Study: Sex Transm Infect. 2003 Dec;79(6):491-4. PMID: 14663128

Vital Signs
Finding	Result	+LR	-LR
[ + ] hearing loss	+ 0 -	1.3	0.8
Study: Sex Transm Infect. 2003 Dec;79(6):491-4. PMID: 14663128

Physical Exam
Finding	Result	+LR	-LR
[ + ] Adnexal tenderness	+ 0 -	1	1.2
in 61 women with non-specific lower abdominal pain Study: Infect Dis Obstet Gynecol. 2002;10(4):171-80; PMID: 12648310
[ + ] Cervical motion tenderness	+ 0 -	1.1	0.9
in 61 women with non-specific lower abdominal pain Study: Infect Dis Obstet Gynecol. 2002;10(4):171-80; PMID: 12648310
[ + ] hearing loss	+ 0 -	1.3	0.8
Study: Sex Transm Infect. 2003 Dec;79(6):491-4. PMID: 14663128
[ + ] Rebound	+ 0 -	2.5	0.8
in 61 women with non-specific lower abdominal pain. Study: Infect Dis Obstet Gynecol. 2002;10(4):171-80; PMID: 12648310