Table 7. The intra-examiner reliability, ICC(1,1) for the measurement of X-ray indices.

ICC: intraclass correlation coefficient; CE: center-edge; SS: sacral slope; PT: pelvic tilt; PI: pelvic incidence; LLA: lumbar lordosis angle

	ICC	95%lower	95%upper
Sharp angle	0.927	0.830	0.975
CE angle	0.982	0.957	0.994
SS	0.960	0.904	0.986
PT	0.977	0.944	0.992
PI	0.964	0.913	0.988
LLA	0.961	0.906	0.987