Table 4.

Differences in lung-dose parameters for SBRT plans based on 3 different ITVs

Parameters	ITVall+slow	ITVall	ITV2+slow	ITVall+slow vs. ITVall		ITVall+slow vs. ITV2+slow		ITVall vs. ITV2+slow
	(Mean ± SD)	(Mean ± SD)	(Mean ± SD)	Mean (range)	p *	Mean (range)	p *	Mean (range)	p *
MLD (cGy)	357.3 ± 89.7	351.6 ± 89.6	353.1 ± 88.1	5.8 (−1.2-33.9)	0.001	4.3 (0.1-13.5)	0.001	−1.5 (−33.8-12.3)	0.887
V5 (%)	17.05 ± 3.90	16.88 ± 3.88	16.94 ± 3.87	0.18 (−0.07-1.04)	0.011	0.11 (−0.01-0.47)	0.001	−0.06 (−1.04-0.54)	0.910
V10 (%)	11.77 ± 2.98	11.57 ± 2.94	11.67 ± 2.98	0.20 (−0.05-1.38)	0.008	0.10 (0.01-0.23)	0.001	−0.10 (−1.37-0.17)	0.820
V20 (%)	5.10 ± 1.90	4.97 ± 1.88	5.00 ± 1.86	0.14 (0.00-0.86)	0.001	0.10 (0.00-0.30)	0.001	−0.03 (−0.85-0.24)	0.776
V25 (%)	3.37 ± 1.37	3.28 ± 1.37	3.29 ± 1.31	0.09 (−0.01-0.55)	0.001	0.09 (0.00-0.37)	0.001	0.00 (−0.55-0.30)	0.496
V30 (%)	2.28 ± 0.98	2.22 ± 0.98	2.22 ± 0.93	0.06 (0.00-0.37)	0.001	0.06 (0.00-0.27)	0.001	0.00 (−0.38-0.21)	0.496

*Wilcoxon signed-rank test.