Table 6.

Irradiation dose to esophagus:^a Dose per fractionation

NO.	2 Gy	2.2 Gy	2.4 Gy	2.6 Gy	2.7 Gy	2.8 Gy	2.85 Gy	2.9 Gy	2.95 Gy	3 Gy
	cm	cm	cm	cm	cm	cm	cm	cm	cm	cm
1	0	0	0	0	0	0	0	0	0	0
2	3	2	0	0	0	0	0	0	0	0
3	8.5	8.5	8.5	7.5	7	6.5	5.5	5	2.5	2
4	0	0	0	0	0	0	0	0	0	0
5	14	14	13.5	13.5	13	12.5	12	10.5	8	4
6	5.5	4.5	4	1	0	0	0	0	0	0
7	2	0	0	0	0	0	0	0	0	0
8	6	5	1.5	0	0	0	0	0	0	0
9	5.5	5.5	4.5	4.5	4.5	4.5	3.5	3	3	2
10	8.5	8.5	8.5	8	7.5	7	6.5	5	0	0
11	7	7	6	6	6	6	6	6	6	6
12	12.5	12.5	12	11	11	11	11	11	7.5	5.5
p	0.018	0.006	0.005	0.002	0.001	0.001	0.000	0.001	0.006	0.009
r b	0.665	0.741	0.749	0.787	0.810	0.810	0.862	0.838	0.737	0.711

^aThe cell values demonstrate the whole circumferential length of esophagus receiving a dose greater than a certain dose per fractionation. For example, “2.7Gy = 13 cm” demonstrated that the whole circumferential length of esophagus received 2.7Gy per fraction or more was 13 cm

^b“r” refers to the correlation coefficient calculated by Spearman’s testing