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. 2015 Jan 23;21(2):118–122. doi: 10.5152/dir.2014.14094

Table 2.

Comparison of strain ratio and gray-scale US findings to determine the presence of PCOS

Parameters Strain ratio US findings


Observer 1 P Observer 2 P No. of follicles P Ovarian volume (cm3) P
AUC 0.888 <0.001 0.939 <0.001 0.959 <0.001 0.962 <0.001
Optimal cutoff >3.8 >3.8 ≥12 ≥10
Sensitivity (%) 87.50 89.5 85.4 100
Specificity (%) 85.42 83.3 89.5 70.8
PPV (%) 85.7 84.3 89.1 77.4
NPV (%) 87.2 88.8 86 100

US, ultrasonography; PCOS, polycystic ovary syndrome; AUC, area under the curve; PPV, positive predictive value; NPV, negative predictive value.