Table 7.

Intra- and inter-observer variability of diastolic RVFW-LSR

	Intra-observer variability			Inter-observer variability
	MD ± SD	ICC (95% CI)	CoV	MD ± SD	ICC (95% CI)	CoV
RVFW-GLSRd	0.18 ± 0.16	0.95 (0.84–0.98)	9.54	0.22 ± 0.23	0.91 (0.73–0.97)	13.92
RVFW-RLSRd
Basal	0.44 ± 0.35	0.91 (0.72–0.97)	10.62	0.54 ± 0.39	0.75 (0.26–0.92)	11.70
Middle-cavity	0.38 ± 0.24	0.79 (0.36–0.93)	10.64	0.38 ± 0.41	0.92 (0.75–0.97)	18.18
Apical	0.38 ± 0.30	0.85 (0.54–0.95)	16.07	0.53 ± 0.48	0.83 (0.49–0.94)	25.39
RVFW-SLSRd
Segment 1	0.72 ± 0.68	0.92 (0.75–0.97)	15.86	0.85 ± 0.62	0.92 (0.77–0.97)	15.11
Segment 2	0.34 ± 0.25	0.88 (0.63–0.96)	10.41	0.53 ± 0.48	0.79 (0.36–0.93)	19.00
Segment 3	0.51 ± 0.58	0.48 (− 0.54–0.83)	23.72	0.53 ± 0.53	0.52 (− 0.42–0.84)	22.89
Segment 4	0.60 ± 0.36	0.65 (− 0.04–0.88)	17.32	0.59 ± 0.47	0.68 (0.04–0.89)	21.12
Segment 5	0.40 ± 0.38	0.89 (0.67–0.96)	17.40	0.71 ± 0.54	0.45 (− 0.63–0.82)	24.55
Segment 6	0.48 ± 0.47	0.68 (0.06–0.89)	29.61	0.54 ± 0.51	0.56 (− 0.30–0.85)	31.83

GLSRd global longitudinal diastolic peak strain rate, RLSRd regional longitudinal diastolic peak strain rate, SLSRd segmental longitudinal diastolic peak strain rate, MD mean difference, SD standard deviation, ICC intra-class correlation coefficient, CI confidence interval, CoV coefficient of variation. The unit of CoV is %