The effect of initial teaching on evaluation of left ventricular volumes by cardiovascular magnetic resonance imaging: comparison between complete and intermediate beginners and experienced observers

Hedström, Erik; Ishida, Masaki; Sepúlveda-Martínez, Alvaro; Ryd, Daniel; Sperling, Johannes; Engblom, Henrik; Nagel, Eike

doi:10.1186/s12880-017-0197-5

Table 1 Agreement, accuracy, precision, repeatability and reliability for LV volumes, function and mass measurements

From: The effect of initial teaching on evaluation of left ventricular volumes by cardiovascular magnetic resonance imaging: comparison between complete and intermediate beginners and experienced observers

EDV (ml)				Coefficient of variability (%)			Limits of agreement			ICC
		1st	2nd	Intra- observer	Inter-observer	Precision	Intra-observer	Inter-observer	Accuracy/precision	Intra-observer	Inter-observer	Accuracy
B1	pre	120 ± 24	120 ± 29	11.2	-	9.0	1 ± 26	-	−44 ± 25	0.880	-	0.177
	post	155 ± 28	158 ± 31	6.1	-	5.8	3 ± 19	-	−9 ± 18	0.944	-	0.910
B2	pre	127 ± 27	135 ± 29	6.8	-	9.8	8 ± 17	-	−37 ± 28	0.916	-	0.357
	post	165 ± 31	166 ± 35	7.5	-	7.8	2 ± 24	-	1 ± 25	0.932	-	0.921
IB	pre	158 ± 32	154 ± 30	7.0	-	6.5	−4 ± 21	-	−6 ± 20	0.934	-	0.931
	post	162 ± 29	172 ± 34	6.7	-	5.8	10 ± 22	-	−2 ± 19	0.898	-	0.952
E1		164 ± 32	164 ± 32	1.7	-	-	0 ± 5	-	-	0.996	-	-
E2		160 ± 32	161 ± 32	2.5	2.5	-	0 ± 8	−4 ± 8	-	0.993	0.986	-
ESV (ml)				Coefficient of variability (%)			Limits of agreement			ICC
		1st	2nd	Intra- observer	Inter-observer	Precision	Intra-observer	Inter-observer	Accuracy/precision	Intra-observer	Inter-observer	Accuracy
B1	pre	52 ± 27	49 ± 29	20.0	-	16.5	−3 ± 20	-	−27 ± 21	0.933	-	0.601
	post	72 ± 35	82 ± 35	23.4	-	15.7	10 ± 36	-	−7 ± 24	0.836	-	0.916
B2	pre	57 ± 30	52 ± 26	27.3	-	19.6	−4 ± 29	-	−23 ± 26	0.858	-	0.692
	post	77 ± 40	78 ± 40	14.7	-	16.0	0 ± 22	-	−2 ± 25	0.961	-	0.942
IB	pre	80 ± 34	81 ± 36	9.2	-	10.2	1 ± 15	-	0 ± 16	0.979	-	0.972
	post	80 ± 33	85 ± 36	8.8	-	6.9	5 ± 14	-	0 ± 11	0.969	-	0.986
E1		80 ± 33	80 ± 33	1.9	-	-	0 ± 3	-	-	0.999	-	-
E2		81 ± 33	80 ± 33	3.6	4.4	-	0 ± 6	1 ± 7	-	0.996	0.994	-
SV (ml)				Coefficient of variability (%)			Limits of agreement			ICC
		1st	2nd	Intra- observer	Inter-observer	Precision	Intra-observer	Inter-observer	Accuracy/precision	Intra-observer	Inter-observer	Accuracy
B1	pre	67 ± 11	71 ± 13	21.2	-	16.6	4 ± 29	-	−17 ± 25	0.243	-	^a
	post	83 ± 16	76 ± 9	23.0	-	20.6	−7 ± 36	-	−2 ± 33	^a	-	0.251
B2	pre	70 ± 16	83 ± 16	25.5	-	21.6	12 ± 38	-	−14 ± 34	0.138	-	^a
	post	88 ± 14	89 ± 15	14.5	-	12.9	1 ± 25	-	3 ± 22	0.621	-	0.565
IB	pre	78 ± 13	73 ± 11	15.7	-	13.3	−5 ± 23	-	−7 ± 21	0.471	-	0.467
	post	82 ± 10	87 ± 10	14.1	-	12.0	5 ± 23	-	−2 ± 20	0.252	-	0.504
E1		84 ± 10	84 ± 10	3.9	-	-	0 ± 6	-	-	0.953	-	-
E2		80 ± 10	81 ± 12	5.1	6.8	-	1 ± 8	−4 ± 11	-	0.933	0.775	-
EF (%)				Coefficient of variability (%)			Limits of agreement			ICC
		1st	2nd	Intra- observer	Inter-observer	Precision	Intra-observer	Inter-observer	Accuracy/precision	Intra-observer	Inter-observer	Accuracy
B1	pre	58 ± 13	61 ± 15	15.8	-	14.1	3 ± 19	-	5 ± 16	0.756	-	0.678
	post	55 ± 15	50 ± 10	23.9	-	18.9	−5 ± 25	-	2 ± 20	0.468	-	0.683
B2	pre	57 ± 15	62 ± 12	22.0	-	19.0	5 ± 26	-	4 ± 21	0.503	-	0.613
	post	55 ± 13	55 ± 14	12.9	-	11.2	0 ± 14	-	2 ± 12	0.870	-	0.857
IB	pre	51 ± 11	49 ± 11	10.9	-	10.3	−2 ± 11	-	−2 ± 10	0.878	-	0.855
	post	52 ± 10	52 ± 10	8.3	-	7.7	0 ± 9	-	−1 ± 8	0.913	-	0.920
E1		53 ± 10	53 ± 10	2.4	-	-	0 ± 2	-	-	0.992	-	-
E2		51 ± 10	52 ± 10	3.6	5.1	-	0 ± 4	−2 ± 5	-	0.984	0.954	-
LVM (g)				Coefficient of variability (%)			Limits of agreement			ICC
		1st	2nd	Intra- observer	Inter-observer	Precision	Intra-observer	Inter-observer	Accuracy/precision	Intra-observer	Inter-observer	Accuracy
B1	pre	162 ± 23	160 ± 24	5.8	-	9.5	−2 ± 18	-	53 ± 25	0.921	-	^a
	post	140 ± 31	131 ± 20	15.5	-	18.2	−9 ± 41	-	30 ± 44	0.645	-	0.123
B2	pre	158 ± 26	154 ± 29	7.0	-	10.2	−4 ± 22	-	49 ± 26	0.915	-	^a
	post	134 ± 21	115 ± 18	7.6	-	9.1	−19 ± 19	-	24 ± 21	0.546	-	0.262
IB	pre	100 ± 17	107 ± 16	5.8	-	7.7	8 ± 12	-	−10 ± 16	0.835	-	0.690
	post	111 ± 16	105 ± 15	6.1	-	6.8	−6 ± 13	-	1 ± 15	0.855	-	0.884
E1		110 ± 14	111 ± 15	3.0	-	-	1 ± 6	-	-	0.972	-	-
E2		111 ± 16	110 ± 15	3.4	2.9	-	−1 ± 7	1 ± 6	-	0.969	0.979	-

LV left ventricle, EDV end-diastolic volume, ESV end-systolic volume, SV stroke volume, EF ejection fraction, LVM LV mass, Limits of agreement: bias ± 1.96SD. ICC Intra-class correlation coefficient. B1-B2 complete beginners, IB intermediate beginner, E1-E2 expert observers. Pre before teaching; post after teaching.^a negative ICC value (see Statistics section for further explanation). Inter-observer between experts. Accuracy and precision between beginners and E1

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