Table 5.

Comparison of the median of the mean doses given to the organs at risk for all patients.

Organs at risk	Median of mean dose (range), Gy		Median of the percentage decrease in mean doses (range)	P value
	Photon plan	Proton plan
Healthy liver	10.2 (5.5 to 23.8)	5.4 (3.3 to 18.3)	42.5 (9.6 to 56.8)	.002
Esophagus	6.2 (0.3 to 16.3)	0.1 (0.0 to 1.7)	98.6 (63.6 to 100)	.002
Spinal cord	3.9 (0.0 to 9.7)	0.0 (0.0 to 0.4)	100 (0.0 to 100)	.004
Whole lung	1.7 (0.1 to 9.6)	0.4 (0.0 to 5.5)	75.0 (32.1 to 100)	.002
Right lung	3.3 (0.2 to 11.9)	0.7 (0.0 to 8.9)	67.8 (32.1 to 100)	.002
Right kidney	0.6 (0.0 to 18.6)	0.0 (0.0 to 12.8)	100 (0.0 to 100)	.008