A preliminary prospective study to compare the diagnostic performance of assist strain ratio versus manual strain ratio

Objectives The objectives of this study were to demonstrate the non-inferiority of assist strain ratio (ASR)—a newly developed application tool—to manual strain ratio (MSR)—a currently available standard diagnostic tool—and to calculate the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of MSR and ASR.