Table 1.

ICC for the reproducibility of the gold standard method for selecting the PF and TT in the ML and AP directions

Observer	ICC
	PF		TT
	ML	AP	ML	AP
Observer 1	0.894	0.909	0.992	0.995
Observer 2	0.933	0.955	0.924	0.975
Observer 3	0.910	0.972	0.904	0.978
Interobserver	0.960	0.994	0.938	0.986

The values in the rows labeled Observers 1, 2, and 3 indicate the reproducibility of the selection of each landmark for each observer (intraobserver); the values in the row labeled Interobserver are the reproducibility of the selection of each landmark across the three observers; ICC = intraclass correlation coefficient; PF = piriformis fossa; TT = tip of the greater trochanter; ML = mediolateral.