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Table 5 Intra-observer and Inter-observer reproducibility of STE parameters

From: Speckle tracking echocardiography analyses of myocardial contraction efficiency predict response for cardiac resynchronization therapy

  Inter-observer ICC P value Intra-observer ICC P value
EC 0.88 (0.82~ 0.92) p < 0.0001 0.94(0.90~ 0.96) p < 0.0001
ECT 0.91 (0.87~ 0.94) p < 0.0001 0.94(0.92~ 0.96) p < 0.0001
MLS 0.8(0.84~ 0.89) p < 0.0001 0.86(0.83~ 0.89) p < 0.0001
TTO 0.73(0.68~ 0.75) p < 0.0001 0.75(0.73~ 0.77) p < 0.0001
TTP 0.81(0.79~ 0.83) p < 0.0001 0.83(0.81~ 0.85) p < 0.0001
TCT 0.85(0.80~ 0.88) p < 0.0001 0.87(0.83~ 0.90) p < 0.0001
ECR 0.89(0.85~ 0.93) p < 0.0001 0.91(0.87~ 0.95) p < 0.0001
ECRT 0.83(0.80~ 0.90) p < 0.0001 0.86(0.81~ 0.92) p < 0.0001
  1. EC effective contraction, ECT effective contractile time, ECR the ratio of effective contraction, ECTR the ratio of effective contractile time, MLS maximum longitudinal strain, TTO time to onset strain, TTP time to peak strain