The Egyptian Heart Journal

Table 12 Agreement between the IFR results and the FFR results in the studied patients

From: Myocardial perfusion imaging by single-photon emission tomography (MPI SPECT) versus Instantaneous wave-free ratio (IFR) for assessment of functional significance of intermediate coronary artery lesions

IFR result	FFR result		Total
IFR result	+ve	−ve	Total
+ve	20	0	20
+ve	90.9%	0%	40.0%
−ve	2	28	30
−ve	9.1%	100%	60.0%
Total	22	28	50
Total	100.0%	100.0%	100.0%
P value	< 0.001
Kappa Agreement	0.918

Data were presented as number and percent
N.B. the positive likelihood ratio was not calculated as the specificity was 100% and the PLR is calculated from the following equation: sensitivity/1−specificity = 90.9/1 − 1 = cannot be calculated

Back to article page