Table 2.

Diagnostic accuracy of evaluation of radiographs of the sacroiliac joints in relation to the availability of clinical information

	Without clinical information	With clinical information	P value
Precision	70.3% (71/101)	78.2% (79/101)	0.008
Sensitivity	50.9%	60%
Specificity	93.5%	100%
ppV	90.3%	100%
npV	61.4%	67.7%
Inter-reader variability (Fleiss’ kappa)	0.56	0.66
Radiologists’ confidence M (SD)	5.2 (1.9)	6.0 (1.7)

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