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Table 3 Dose–response relationship

From: Regional recurrence of oropharyngeal cancer after definitive radiotherapy: a case control study

Dose interval

OR

p value

No of RR/controls

Mean dose, D mean

10–40

0.85

0.856

5/9

40–50

0.19

0.073

3/27

50–60

0.33

0.326

2/9

>60

0.48

0.453

9/29

Reference = dose category 0–10

  

4/6

Median dose, D 50%

10–40

0.93

0.935

4/7

40–50

0.18

0.049

3/34

50–60

1.57

0.705

2/2

>60 9/31

0.65

0.650

Reference = dose category 0–10

4/6

  1. Relationship between dose to lymph node level (LNL) of interest and regional recurrences presented as odds ratio (OR). Dose interval presented in Gy, the distribution of cases/controls per dose interval is presented below the dose interval