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. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: Am J Cardiol. 2009 Jun 6;104(3):419–428. doi: 10.1016/j.amjcard.2009.03.058

Table 3.

Intra- and inter-observer variability

Variable Echo intra-observer Echo inter-observer CMR inter-observer
N ICC W/in SD (% mean) N ICC W/in SD (% mean) N ICC W/in SD (% mean)
LV EDV (ml) 59 0.95 11.3 (16%) 59 0.92 15.9 (24%) 35 0.99 6.5 (7%)**
LV ESV (ml) 59 0.91 5.1 (18%) 59 0.87 6.5 (24%) 35 0.95 6.8 (18%)
LV EF (%) 59 0.54 7.6 (13%) 59 0.56 8.2 (14%) 35 0.46 6.2 (10%)
LV mass (g) 59 0.83 17.6 (22%) 59 0.78 24.8 (31%) 35 0.96 13.2 (17%)**
RV EDV (ml) 46 0.88 14.3 (20%) 47 0.85 19.6 (26%) 24 0.94 16.4 (17%)
RV ESV (ml) 46 0.86 7.0 (21%) 47 0.82 9.6 (28%) 23 0.90 7.4 (19%)
RV EF (%) 46 0.35 8.7 (15%) 47 0.43 8.2 (15%) 24 0.50 6.4 (12%)
RV mass (g) 46 0.78 19.1 (22%) 48 0.72 35.5 (40%) 24 0.85 23.2 (34%)*
*

p-value for likelihood ratio test of equality between echocardiography and CMR of w/in SD < 0.05

**

p-value for likelihood ratio test of equality between echocardiography and CMR of w/in SD < 0.001

CMR: cardiac magnetic resonance; EDV: end-diastolic volume; ESV: end-systolic volume; g: grams; ml: milliliters; LV: left ventricle; RV: right ventricle; ICC: intra-class correlation coefficient; W/in SD: within-subject standard deviation