Table III.

Reliability and reproducibility of the evaluated study variables. Values are expressed as mean intraclass correlation coefficient with 95% confidence intervals.

Parameter	ICC intraobserver 1	ICC intraobserver 2	ICC interobserver
Pelvic incidence	0.91 (0.85 to 0.95)	0.95 (0.91 to 0.97)	0.92 (0.89 to 0.95)
Pelvic tilt	0.80 (0.65 to 0.89)	0.77 (0.61 to 0.88)	0.72 (0.63 to 0.81)
Sacral slope	0.85 (0.73 to 0.91)	0.81 (0.66 to 0.89)	0.82 (0.66 to 0.9)
APP angle	0.89 (0.85 to 0.95)	0.91 (0.81 to 0.97)	0.85 (0.79 to 0.95)

APP, anterior pelvic plane; ICC, intraclass correlation coefficient.