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Table 3 Agreement between different echocardiographic modalities

From: Transesophageal echocardiography measurements of aortic annulus diameter using biplane mode in patients undergoing transcatheter aortic valve implantation

  Mean difference ± SD Limits of agreement r-value p-value*
 TTE-2DTEE −2.0±2.1 −6.2 to 2.2 0.60 <0.05
 TTE-BP −2.5±1.9 −6.3 to 1.3 0.58 <0.05
 TTE-3DTEE −2.7±1.8 −6.3 to 0.9 0.64 <0.05
 2DTEE-BP −0.6±1.7 −4.0 to 2.8 0.72 <0.05
 2DTEE-3D −0.8±2.0 −4.8 to 3.2 0.62 <0.05
 BP-3DTEE −0.2±0.9 −2.0 to 1.6 0.88 <0.05
  1. SD denotes standard deviation; TTE, transthoracic echocardiography; TEE, transesophageal echocardiography; BP, biplane; 3D, three-dimensional. *P-value for correlation coefficient.