Table 3.

Inter-observer reproducibility and the influence of echocardiographic image quality for strain imaging. P-values were calculated using the Kruskal-Wallis-Test and Mann-Whitney-U-Test.

	Stress level	Limits of agreement				p-value
		total	<70%	70–95%	95% to 100%	total	70% to 95% vs.<70%	95–100% vs. 70% − 95%	<70% vs 95–100%
SAXM	Baseline	−5.74; 5.53	−2.95; 3.74	−7.28; 6.71	−4.25; 4.26	0.044	0.132	0.072	0.375
	Low stress	−6.39; 6.94	−9.16; 9.99	−7.12; 7.98	−4.00; 3.94	0.167	0.635	0.057	0.594
	High stress	−4.82; 6.36	−3.62; 5.06	−5.17; 7.31	−5.17; 6.09	0.775	0.578	0.931	0.462
SAXB	Baseline	−3.41; 4.96	−3.88; 3.54	−4.28; 6.54	−2.17; 3.47	0.450	0.631	0.841	0.687
	Low stress	−3.43; 6.52	−6.62; 12.22	−3.53; 7.31	−2.28; 3.61	0.454	0.623	0.137	0.373
	High stress	−2.31; 4.35	−3.46; 5.78	−2.11; 4.03	−2.05; 4.06	0.253	0.303	0.105	0.477
AP4	Baseline	−2.79; 4.74	−1.99; 4.67	−2.34; 3.96	−6.10; 7.56	0.416	0.101	0.738	0.423
	Low stress	−3.65; 4.90	−3.87; 5.70	−3.91; 4.52	−1.22; 1.68	0.184	0.538	0.045	0.061
	High stress	−3.51; 5.24	−3.96; 5.74	−3.94; 5.50	−1.31; 3.29	0.354	0.610	0.167	0.122
AP 2	Baseline	−3.05; 4.16	−4.08; 4.43	−2.39; 4.06	−3.46; 4.01	0.669	0.446	0.861	0.433
	Low stress	−2.29; 3.65	−2.51; 4.48	−1.64; 2.33	−1.82; 2.14	0.066	0.087	0.704	0.096
	High stress	−2.95; 3.82	−3.01; 4.98	−1.54; 2.18	−4.72; 4.02	0.257	0.074	0.372	0.481
AP 3	Baseline	−4.60; 4.89	−5.62; 5.34	−3.34; 4.60	−6.91; 4.11	0.630	0.705	0.707	1.000
	Low stress	−2.89; 5.98	−3.09; 7.05	−1.92; 3.51	−3.15; 6.23	0.166	0.121	0.265	0.614
	High stress	−2.56; 5.89	−2.92; 6.79	−3.01; 5.33	−1.34; 5.52	0.623	0.782	0.353	0.469