Table 4 Optimal cut-off values for and crude rates of Grade 3 radiation dermatitis
Cut-off value | Grade 3 radiation dermatitis < Cut-off > Cut-off | P-value | ||
|---|---|---|---|---|
V5Gy (cm3) | 690 | 5/40 (12.5%) | 21/61 (34.4%) | 0.019 |
V10Gy (cm3) | 565 | 5/40 (12.5%) | 21/61 (34.4%) | 0.019 |
V20Gy (cm3) | 400 | 9/66 (13.6%) | 17/35 (48.6%) | < 0.01 |
V30Gy (cm3) | 190 | 2/38 (5.3%) | 24/63 (38.1%) | < 0.01 |
V40Gy (cm3) | 115 | 2/34 (5.9%) | 24/67 (35.8%) | < 0.01 |
V50Gy (cm3) | 85 | 8/54 (14.8%) | 18/47 (38.3%) | 0.011 |
V60Gy (cm3) | 38 | 6/55 (10.9%) | 20/46 (43.4%) | < 0.01 a |