Table 3.

Diagnostic accuracy of imaging evaluation including radiographs and MRI of sacroiliac joints in relation to the availability of clinical information

	Without clinical information	With clinical information	P value
Precision	80.8% (80/99)	81.8% (81/99)	1.00
Sensitivity	74.1%	70.7%
Specificity	90.2%	97.6%
ppV	91.5%	97.6%
npV	71.2%	70.2%
Inter-reader variability (Fleiss‘ kappa)	0.77	0.76
Radiologists’ confidence M (SD)	6.7 (1.6)	7.2 (1.6)

M, mean; npV, negative predictive value; ppV, positive predictive value.