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Table 4 Intraclass Correlation Coefficient (ICC) and Standard deviation (SD) of Intra- and Inter- rater reliability error for landmarks digitization of X, Y and Z coordinates for Reference system

From: United Reference Method for three-dimensional treatment evaluation

Landmark

Intra-rater

Inter-rater

X

Y

Z

X

Y

Z

ICC

SD

ICC

SD

ICC

SD

ICC

SD

ICC

SD

ICC

SD

C-SELLA

Single Measures

1

0.070

1

0.014

1

0.032

0.998

0.064

0.999

0.238

1

0.108

Average Measures

1

1

1

0.999

1

1

R-SELLA

Single Measures

1

0.097

1

0.0359

1

0.026

0.992

0.116

0.999

0.220

1

0.126

Average Measures

1

1

1

0.997

1.000

1

L-SELLA

Single Measures

1

0.029

1

0.023

1

0.052

0.996

0.093

0.999

0.254

1

0.116

Average Measures

1

1

1

0.999

1

1

R-PORION

Single Measures

0.994

0.497

1

0.102

1

0.083

0.945

0.724

0.998

0.195

0,999

0.242

Average Measures

0.998

1

1

0.981

0.999

1

L-PORION

Single Measures

0.990

0.788

1

0.180

1

0.172

0.995

0.618

1

0.258

0,998

0.172

Average Measures

0.997

1

1

0.998

1

0,999

R-ORBITALE

Single Measures

0.999

0.229

0.999

0.305

1

0.055

0.742

0.980

0.982

0.462

0,999

0.170

Average Measures

1

1

1

0.896

0.994

1

L-ORBITALE

Single Measures

0.994

0.200

0.996

0.676

1

0.108

0.915

1.112

0.967

0.532

0,999

0.159

Average Measures

0.998

0.998

1

0.97

0.989

1