The feasibility, reliability, and incremental value of two-dimensional speckle-tracking for the detection of significant coronary stenosis after treadmill stress echocardiography

Table 4 Interobserver variability for strain imaging

r	Bias	LOA	% mean relative difference	ICC (mean rating)
Baseline GLS
0.79	0.63	± 3.81	-4%	0.87
Baseline apical segments (segments 13–17)
0.74	1.15	± 6.74	-6%	0.84
Peak stress GLS
0.85	0.09	± 4.12	-1.47%	0.92
Peak stress apical segments (segments 13-17)
0.81	-0.78	± 9.24	4.19%	0.89

ICC intra-class correlation coefficient, GLS global longitudinal strain, LOA limit of agreement (± 1.96 standard deviations); % mean relative difference = (100 x (measure 1 – measure 2))/(measure 1)

ISSN: 1476-7120