Table 1.

The intraclass and interclass correlation coefficients of radiographic measurements.

Parameters	Intra-observer reliability		Inter-observer reliability
	Intraclass Correlation	95% Confidence Interval	Intraclass Correlation	95% Confidence Interval
OI	0.814	0.516–0.928	0.715	0.461–0.890
OS	0.806	0.614–0.912	0.742	0.505–0.901
OT	0.886	0.735–0.926	0.816	0.656–0.902
C0-C2	0.856	0.725–0.921	0.836	0.751–0.914
C2-C7	0.843	0.637–0.909	0.894	0.754–0.927
C0-C7	0.827	0.618–0.891	0.858	0.737–0.886
T1S	0.841	0.713–0.916	0.855	0.721–0.913
TK	0.890	0.741–0.930	0.881	0.750–0.922

Abbreviation: Occipital incidence (OI), occipital slope (OS), occipital tilt (OT), C0-C2 angle (C0-C2), C2-C7 angle (C2-C7), C0-C7 angle (C0-C7), T1 slope (T1S), thoracic kyphosis (TK).