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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)MRnoSWIa (n = 13)P ValuebMRnoSWIc (n = 71)
Sensitivity (%)86 (6/7)14.3 (1/7).01533 (9/27)
Specificity (%)83 (5/6)83 (5/6)NS95 (42/44)
PPV (%)86 (6/7)50 (1/2)NS82 (9/11)
NPV (%)83 (5/6)83 (5/6)NS70 (42/60)
Accuracy (%)85 (11/13)46 (6/13).04872 (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.