Table 5. Normal Lung Dose Volume Distributions by Development of Pneumonitis.

Parameter	All Patients (n = 45)	Patients without Pneumonitis (n = 36)	* Patients with Pneumonitis (n = 9)	OR (95% CI)	p-value
Whole Lung V20 (%)	4.8 ± 2.3	4.7 ± 2.3	5.2 ± 2.4	1.08 (0.80, 1.47)	p = 0.62
Whole Lung V10 (%)	11.9 ± 5.1	12.0 ± 5.6	11.8 ± 3.3	0.99 (0.86, 1.15)	p = 0.94
Whole Lung V5 (%)	19.0 ± 6.9	18.8 ± 7.2	19.8 ± 5.7	1.02 (0.92, 1.13)	p = 0.71
Mean Dose to Whole Lung (Gy)	4.0 ± 1.5	3.9 ± 1.6	4.1 ± 1.2	1.10 (0.69, 1.76)	p = 0.69

Values are expressed as mean ± SD, n = number of patients

OR = odds ratio, CI = confidence interval

V20 = volume receiving 20 Gy, V10 = volume receiving 10 Gy, V5 = volume receiving 5 Gy

^*Toxicity was graded using CTCAE v3.0. Nine patients had grade 1-3 pneumonitis. No patient had grade 4, or grade 5 pneumonitis