Table 2.

Normal tissue complication probability using three different parameter combinations.

	(A) Original plan	(B) Plan with head tilt of +5°	(C) Plan with head tilt of −5°	Wilcoxon signed rank test with Bonferroni's correction P < 0.05
Burman et al. [24] [× 10−5]	0.35 ± 0.55	0.85 ± 1.40	0.18 ± 0.21	(A) vs (B)
				(A) vs (C)
				(B) vs (C)
Eisbruch et al. [25] [× 10−4]	0.31 ± 0.63	0.91 ± 2.13	0.11 ± 0.19	(A) vs (C)
				(B) vs (C)
Roesink et al. [26] [× 10−1]	0.32 ± 0.08	0.38 ± 0.12	0.30 ± 0.06	(A) vs (B)
				(A) vs (C)
				(B) vs (C)