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Table 3 Comparisons of skin dose parameters among patients with Grades 1–3 dermatitis

From: A scoring system predicting acute radiation dermatitis in patients with head and neck cancer treated with intensity-modulated radiotherapy

Skin (mean ± SD)

Grade 1

Grade 2

Grade 3

P-value

V5 Gy (cm3)

566 ± 224

693 ± 136

745 ± 85

< 0.01

V10 Gy (cm3)

438 ± 197

568 ± 119

620 ± 81

< 0.01

V20 Gy (cm3)

262 ± 128

365 ± 92

410 ± 73

< 0.01

V30 Gy (cm3)

152 ± 75

216 ± 68

247 ± 48

< 0.01

V40 Gy (cm3)

96 ± 45

133 ± 47

149 ± 28

< 0.01

V50 Gy (cm3)

59 ± 30

83 ± 33

95 ± 24

< 0.01

V60 Gy (cm3)

25 ± 17

40 ± 22

49 ± 16

< 0.01

  1. Abbreviations: SD standard deviation, VdGy volume of the skin that received more than the threshold dose of d Gy
  2. P-value: derived by Mann–Whitney U-test comparisons between Grades 1–2 and Grade 3 patients
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Radiation Oncology

ISSN: 1748-717X

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