For interpreting likelihood ratios, consult McGee (PMID: 12213147; PMC1495095); only transvaginal ultrasonography yields helpful accuracy. As frequently happens, the physical examination was much more specific than sensitive.
|cervical motion tenderness||45||91||4.9||0.62|
|peritoneal findings*||23 to 27||94 to 95||4.2 to 4.5||0.78 to 0.81|
|* Only two studies. Did not pool|
Crochet JR, Bastian LA, & Chireau MV (2013). Does this woman have an ectopic pregnancy?: the rational clinical examination systematic review. JAMA : the journal of the American Medical Association, 309 (16), 1722-9 PMID: 23613077