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Table 3 Intra-observer and inter-observer variabilities of LA TDI

From: Tissue Doppler Imaging and strain rate of the left atrial lateral wall: age related variations and comparison with parameters of diastolic function

Variable INTRA-OBSERVER INTER-OBSERVER
MD ± SD COR MD ± SD COR
S’la basal 0.06 ± 1.01 2.02 0.56 ± 1.56 3.12
E’la basal 0.16 ± 1.01 2.02 −0.26 ± 1.85 3.7
A’la basal 0.03 ± 1.21 2.42 0.2 ± 1.91 3.82
S’la mid 0.16 ± 1.28 2.56 0.9 ± 1.9 3.8
E’la mid 0.06 ± 1.41 2.82 0.53 ± 2.52 5.04
A’la mid 0.1 ± 1.39 2.78 0.06 ± 2.21 4.42
  1. MD mean difference, SD standard deviation, COR coefficient of repeatability, la left atrial