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Table 3 Patient and tumor characteristics stratified by radiation dose

From: Five-fraction SBRT for ultra-central NSCLC in-field recurrences following high-dose conventional radiation

Variable

Mean / Number

p-value

<40 Gy

≥40 Gy

Age (Years)

66.36

72.44

0.230

GTV (cc)

147.06

71.36

0.068

Esophagus Max Point Dose (Gy)

25.74

21.61

0.337

Spinal Cord Max Point Dose (Gy)

9.61

8.26

0.473

SBRT Plan Max Point Dose (Gy)

41.71

51.86

<0.01

Prior Dose (Gy)

63.91

62.67

0.481

Prior EQD2 (Gy)

63.27

61.97

0.526

Tumor SBRT EQD2 (Gy)

41.10

62.50

<0.01

Total Combined EQD2 (Gy)

104.36

124.47

<0.01

Gender

 Male

7

5

0.535

 Female

4

4

ECOG PS

 0

8

4

0.289

 1

3

2

 2

0

1

 3

0

2

Chemotherapy

 Yes

3

5

0.362

 No

8

4