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Table 2 Ultrasound, Palpation and Computed Tomography: Inter-rater agreement and reliability

From: Does ultrasound provide any added value in breast contouring for radiotherapy after conserving surgery for cancer?

 

Lower and upper limits of agreement

Kendall’s τ

ICC

 

US-PALP

US-CT

PALP-CT

US-PALP

US-CT

PALP-CT

US-PALP

US-CT

PALP-CT

Breast volume (cc)

−52 to 208

−87 to 168

−98 to 23

0.705*

0.579*

0.147

0.965

0.981

0.991

Posterior extension (cm)

−0.27 to 2.20

−0.88 to 1.38

−1.65 to 0.22

0.275

0.222

0.026

0.605

0.869

0.732

Medial extension (cm)

−0.38 to 1.44

−0.64 to 0.93

−1.20 to 0.42

−0.064

0.369°

−0.251

0.880

0.950

0.913

Lateral extension (cm)

−0.52 to 0.83

−0.44 to 0.70

−0.43 to 0.38

0.018

0.249

0.032

0.950

0.963

0.983

Cranial extension (cm)

−0.44 to 2.04

−0.42 to 1.40

−1.40 to 0.78

0.091

0.289

−0.395

0.666

0.827

0.834

Caudal extension (cm)

−0.35 to 1.41

−0.48 to 1.91

−0.57 to 0.95

0.032

−0.150

−1.185

0.810

0.661

0.918

  1. Abbreviations: US Ultrasound, PALP Palpation, CT Computed tomography, ICC Intraclass correlation coefficient
  2. * p < 0.001; °p < 0.05