Table 2:

Sensitivity, specificity, PPV, NPV, and accuracy of MRSWI versus MRnoSWI for detection of calcification in ODs compared with our criterion standard CT

	MRSWI (n = 13)	MRnoSWI^a (n = 13)	P Value^b	MRnoSWI^c (n = 71)
Sensitivity (%)	86 (6/7)	14.3 (1/7)	.015	33 (9/27)
Specificity (%)	83 (5/6)	83 (5/6)	NS	95 (42/44)
PPV (%)	86 (6/7)	50 (1/2)	NS	82 (9/11)
NPV (%)	83 (5/6)	83 (5/6)	NS	70 (42/60)
Accuracy (%)	85 (11/13)	46 (6/13)	.048	72 (51/71)

Note:—PPV indicates positive predictive value, NPV, negative predictive value; NS, not statistically significant.
↵a Those cases with SWI sequences but read without the SWI sequences.
↵b Significance = P < .05.
↵c All cases read without SWI sequences.