Table 3. Intraclass correlation coefficient (ICC) and 95% coefficient intervals for digital measurement of the Cobb angles (n = 222).

		Data	ICC	CI 95%
		Intraobserver1	0.996	0.992–0.998
		Intraobserver2	0.989	0.980–0.995
	Kyphosis	Intraobserver3	0.984	0.969–0.992
		Interobserver1,2,3	0.982	0.967–0.990
		Interobserver,2,3	0.972	0.950–0.985
Cobb angles
		Intraobserver1	0.99	0.980–0.995
		Intraobserver2	0.958	0.915–0.979
	Scoliosis	Intraobserver3	0.936	0.876–0.967
		Interobserver1,2,3	0.957	0.926–0.976
		Interobserver1,2,3	0.964	0.936–0.981

CI: Coefficient Interval; 1,2,3: refer to the 3 observers. ICC: intra class correlation coefficients.