Table 3 Intra- and Inter-rater reliability ICC values

Intra-rater reliability

Cobb

TPA

CL

T1 slope

TK1–12

TK2–12

TK1–5

TK2–5

TK5–12

LL

PT

PI

SS

Xp

0.986(0.970–0.994)

0.938(0.868–0.972)

0.938(0.868–0.972)

0.962(0.918–0.983)

0.97(.0935–0.986)

0.841(0.680–0.925)

0.86(0.715–0.934)

0.709(0.453–0.857)

0.885(0.763–0.947)

0.924(0.840–0.965)

0.932(0.856–0.969)

0.912(0.815–0.959)

0.916(0.824–0.961)

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

CT

0.996(0.990–0.998)

0.994(0.987–0.997)

0.990(0.978–0.995)

0.995(0.988–0.998)

0.996(0.992–0.998)

0.995(0.990–0.998)

0.983(0.963–0.992)

0.976(0.949–0.989)

0.993(0.985–0.997)

0.997(0.993–0.999)

0.997(0.994–0.999)

0.98(0.956–0.991)

0.994(0.988–0.997)

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

Inter-rater reliability

Cobb

TPA

CL

T1 slope

TK1–12

TK2–12

TK1–5

TK2–5

TK5–12

LL

PT

PI

SS

Xp

0.891(0.774–0.949)

0.908(0.806–0.957)

0.912(0.633–0.969)

0.924(0.840–0.965)

0.919(0.827–0.963)

0.770(0.550–0.890)

0.784(0.575–0.897)

0.637(0.333–0.820)

0.791(0.587–0.900)

0.883(0.759–0.946)

0.883(0.756–0.946)

0.804(0.609–0.907)

0.866(0.724–0.938)

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

CT

0.978(0.953–0.990)

0.992(0.838–0.998)

0.938(0.868–0.972)

0.981(0.958–0.991)

0.971(0.935–0.987)

0.980(0.947–0.992)

0.929(0.848–0.967)

0.929(0.809–0.971)

0.988(0.973–0.994)

0.982(0.961–0.992)

0.982(0.839–0.995)

0.931(0.681–0.977)

0.986(0.955–0.994)

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p < 0.001