Table 1.

Detailed results of Bland-Altaman analysis with mean error of the differences between the direct and indirect coordinates compared to the clinically effective coordinates.

	Indirect targeting	Direct targeting
Error (RL)	0.08 ± 0.46 (95% CI − 0.14–0.30)	0.02 ± 0.78 (95% CI − 0.36–0.40)
Error (AP)	0.22 ± 0.70 (95% CI − 0.11–0.56)	0.21 ± 0.58 (95% CI 0.86–1.83)
Error (SI)	0.02 ± 0.52 (95% CI − 0.27–0.23)	0.26 ± 0.45 (95% CI − 0.05–0.48)