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Table 5 Intraobserver and Interobserver Agreement for LV S Parameters

From: Two-dimensional speckle tracking echocardiography predicts early subclinical cardiotoxicity associated with anthracycline-trastuzumab chemotherapy in patients with breast cancer

Variable

Intraclass Correlation Coefficient (95% CI)

Intraobserver

Interobserver

Longitudinal

 S

0.969 (0.898-0.984)

0.956 (0.905-0.975)

 SR

0.872 (0.641-0.944)

0.986 (0.973-0.993)

 SRe

0.905 (0.747-0.960)

0.949 (0.875-0.967)

Circumferential

 S

0.957 (0.898-0.984)

0.778 (0.555-0.887)

 SR

0.898 (0.754-0.961)

0.997 (0.992-0.999)

 SRe

0.719 (0.309-0.892)

0.986 (0.957-0.993)

Radial

 S

0.934 (0.834-0.974)

0.887 (0.627-0.942)

 SR

0.866 (0.653-0.946)

0.960 (0.875-0.980)

 SRe

0.734 (0.340-0.897)

0.871 (0.477-0.918)

  1. Abbreviations: S strain, SR strain rate, SRe peak early diastolic strain rate