TABLE 5.

Intra-observer and inter-observer variability.

	Intra-observer variability			Inter-observer variability
	ICCs	95% CI	P-value	ICCs	95% CI	P-value
LV GLS	0.970	0.928–0.987	<0.001	0.947	0.874–0.978	<0.001
PSD	0.936	0.849–0.974	<0.001	0.893	0.740–0.956	<0.001
GWI	0.966	0.899–0.987	<0.001	0.941	0.857–0.975	<0.001
GCW	0.977	0.938–0.991	<0.001	0.953	0.875–0.981	<0.001
GWW	0.897	0.755–0.957	<0.001	0.817	0.557–0.924	<0.001
GWE	0.858	0.663–0.941	<0.001	0.780	0.464–0.909	0.001

ICCs, intraclass correlation coefficients; CI, confidence interval; LV GLS, left ventricular global longitudinal strain; PSD, peak strain dispersion; GWI, global work index; GCW, global constructive work; GWW, global wasted work; GWE, global work efficiency.