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Table 4 Intra-observer and inter-observer reliability and agreement

From: Reference range of fetal thorax using two-dimensional and three-dimensional ultrasound VOCAL technique and application in fetal thoracic malformations

Parameter Intra-observer Inter-observer
ICC (95%CI) Mean difference (95% LoA) ICC (95%CI) Mean difference (95% LoA)
Thoracic transverse diameter 0.9981
0.9967–0.9989
0.0062
− 0.2070–0.1946
0.9899
0.9823–0.9942
0.0054
− 0.2845–0.2953
Thoracic anteroposterior diameter 0.9992
0.9986–0.9995
0.0048
− 0.1039–0.1135
0.9948
0.9908–0.9970
− 0.0060
− 0.2613–0.2493
Thoracic circumference 0.9808
0.9665–0.9890
− 0.0470
− 0.2463–0.1523
0.9203
0.8662–0.9531
0.1286
− 2.7965–3.0537
Thoracic area 0.9874
0.9781–0.9928
− 0.0556
− 0.4865–0.3753
0.9798
0.9653–0.9883
0.0218
− 3.8034–3.8470
Lung volume 0.9388
0.9631–0.9878
− 0.0428
− 0.9143–0.8287
0.9191
0.9466–0.9823
− 0.5338
− 7.7247–6.6571
Thoracic volume 0.9590
0.9807–0.9937
0.0922
− 0.9856–1.1700
0.9411
0.9672–0.9892
− 0.4964
− 10.2373–9.2445
  1. ICC intraclass correlation coefficient, CI confidence interval, LoA limits of agreement