Table 4.

OAR sparing comparison

				p‐value
	CRT	IMRT	VMAT	CRT vs. IMRT	CRT vs. VMAT	IMRT vs. VMAT
Cord
Dmax (cGy)	$4021.9\pm 197.9$	$3871.2\pm 142.4$	$3499.7\pm 1013.1$	0.98	0.48	0.73
Dmean (cGy)	$2935.0\pm 353.9$	$2080.7\pm 318.9$	$1891.6\pm 701.4$	0.02	0.003	0.89
EUD (cGy)	$3686.9\pm 63.7$	$2989.5\pm 158.2$	$2697.6\pm 845.8$	0.12	0.013	0.76
NTCP $(\times {10}^{-4})$	$61.3\pm 9.1$	$10.8\pm 4.4$	$10.8\pm 9.4$	$<0.01$	$<0.01$	1.00
Lung
Dmean (cGy)	$1244.6\pm 134.1$	$1422.6\pm 213.0$	$1467.1\pm 198.05$	0.26	0.11	0.97
NTCP	$0.0054\pm 0.0027$	$0.019\pm 0.015$	$0.022\pm 0.014$	0.18	0.06	0.94
V5	$47.9\pm 6.1$	$78.2\pm 13.7$	$80.8\pm 14.9$	$<0.01$	$<0.01$	1.00
V10	$36.5\pm 4.6$	$58.6\pm 10.5$	$67.7\pm 14.0$	0.03	$<0.01$	0.38
V13	$33.2\pm 4.2$	$48.4\pm 8.2$	$53.0\pm 10.1$	0.05	$<0.01$	0.67
V20	$27.5\pm 3.5$	$24.3\pm 3.7$	$22.2\pm 3.8$	0.30	0.03	0.64
V30	$13.2\pm 3.3$	$8.6\pm 3.3$	$8.8\pm 3.3$	0.04	0.05	1.00
Heart
Dmean (cGy)	$2942.5\pm 993.0$	$2332.4\pm 937.6$	$2264.4\pm 873.6$	0.56	0.48	1.00
EUD (cGy)	$3773.8\pm 694.1$	$3128.5\pm 682.7$	$3087.6\pm 616.9$	0.22	0.18	1.00
NTCP	$0.11\pm 0.10$	$0.021\pm 0.023$	$0.016\pm 0.017$	0.12	0.008	0.99
V25	$63.2\pm 23.0$	$48.4\pm 23.2$	$40.1\pm 18.5$	0.51	0.15	0.86
V30	$58.4\pm 22.5$	$34.7\pm 16.7$	$28.6\pm 12.8$	0.04	0.007	0.88
V50	$14.5\pm 8.0$	$8.7\pm 5.9$	$8.9\pm 5.6$	0.30	0.33	0.88
Body
V5	$39.1\pm 8.8$9.1±8.8	$54.4\pm 11.8$	$58.9\pm 13.5$	0.07	0.01	0.87
V10	$32.7\pm 7.5$	$38.2\pm 9.7$	$43.7\pm 11.5$	0.71	0.17	0.71
V15	$29.3\pm 6.9$	$30.2\pm 7.7$	$28.8\pm 8.5$	1.00	1.00	1.00

$p=0.04$ and $p=0.007$, respectively. The low dose (V5) delivered to the healthy tissue outside of PTV was increased by IMRT ($p=0.07$) and VMAT ($p=0.01$) compared to CRT.