Table 2.
Summary of dosimetric statistics for the esophagus, mean (SD)
| Variable | Grade <2 | Grade ≥2 | P-value | |
|---|---|---|---|---|
| Dx (Gy) | D10 | 49.1 (20.9) | 64.4 (9.9) | .0004 |
| D20 | 41.1 (22.2) | 59.3 (13.3) | .0003 | |
| D30 | 33.8 (22.6) | 52.6 (17.6) | .0005 | |
| D40 | 25.2 (18.9) | 41.5 (22.2) | .0023 | |
| D50 | 16.3 (15.7) | 29.2 (22.7) | .0291 | |
| D60 | 11.0 (13.3) | 17.9 (19.6) | .1840 | |
| D70 | 7.3 (9.7) | 9.1 (12.8) | .7860 | |
| D80 | 2.9 (3.3) | 4.0 (7.4) | .9049 | |
| Vx (%) | V10 | 48.3 (24.4) | 57.6 (16.1) | .1205 |
| V20 | 40.1 (22.4) | 52.6 (17.0) | .0293 | |
| V30 | 30.6 (20.4) | 48.3 (17.2) | .0004 | |
| V40 | 24.8 (19.6) | 43.7 (17.6) | .0001 | |
| V50 | 18.7 (18.5) | 37.7 (18.0) | .0001 | |
| V60 | 12.3 (15.0) | 28.5 (16.9) | .0001 | |
| V70 | 2.8 (7.1) | 8.0 (12.6) | .0871 | |
| MOHx (Gy) | MOH10 | 54.3 (19.0) | 66.6 (8.6) | .0018 |
| MOH20 | 49.7 (19.8) | 64.3 (9.5) | .0004 | |
| MOH30 | 45.6 (20.3) | 61.6 (10.9) | .0003 | |
| MOH40 | 41.5 (20.1) | 58.0 (12.5) | .0003 | |
| MOH50 | 37.2 (18.9) | 53.5 (13.8) | .0003 | |
| MOH60 | 33.2 (17.3) | 48.4 (14.2) | .0005 | |
| MOH70 | 29.8 (16.0) | 43.2 (13.8) | .0008 | |
| MOH80 | 26.5 (14.5) | 38.3 (12.9) | .0013 | |
| Other (Gy) | Mean Dose | 21.8 (11.6) | 31.6 (10.4) | .0011 |
| Minimum Dose | 0.9 (1.6) | 0.8 (1.4) | .6263 | |
| Maximum Dose | 62.9 (15.3) | 69.7 (8.0) | .0767 |
Dx, minimum dose to the x% volume of the esophagus receiving the highest doses; MOHx, mean dose of the x% volume of the esophagus receiving the highest doses; Vx, percentage volume of the esophagus receiving at least x Gy.