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Table 2 Prediction validation of dosimetric parameters on radiation-induced choanal stenosis

From: Dosimetric parameters predict radiation-induced choanal stenosis in patients with nasopharyngeal carcinoma

  

NC

RICS

Chi-square

P value

Dmean / Gy

<  54.22

34 (69.4%)

18 (36.7%)

10.48

0.001 **

≥ 54.22

15 (30.6%)

31 (63.3%)

  

D33 / Gy

<  61.96

29 (59.2%)

15 (30.6%)

8.084

0.004 **

≥ 61.96

20 (40.8%)

34 (69.4%)

  

D66 / Gy

<  46.50

31 (63.3%)

13 (26.5%)

13.36

<  0.001 **

≥ 46.50

18 (36.7%)

36 (73.5%)

  

V60 / %

<  48.13

41 (83.7%)

25 (51.0%)

11.87

0.001 **

≥ 48.13

8 (16.3%)

24 (49.0%)

  
  1. Abbreviations: NC normal control, RICS radiation-induced choanal stenosis, Dmean mean dose, D33 dose covering ≥33% volume, D66 dose covering ≥66% volume, V60 volume receiving ≥60 Gy. ** P < 0.01
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Radiation Oncology

ISSN: 1748-717X

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