Table 1 Patient characteristics at the time of SBRT

Median age, years (range)

71 (41–94)

Median KPS (range)

80 (60–100)

Gender, N

  Female

19

  Male

20

History of tobacco use, N (%)

39 (100%)

COPD, N (%)

22 (56%)

Median follow-up, months (range)

12.6 (1.3-47.5)

Median interval between fractionated RT and SBRT, months (range)

37 (1–180)

Type of initial radiation, N

  Conventional

13

  3D-CRT

12

  IMRT

14

Median prior radiation dose, Gy (range)

61 (30–80)

History of thoracic surgery, N (%)

21 (54%)

History of chemotherapy, N (%)

22 (56%)

Diagnosis, N

  Primary lung cancer

17

   Stage I-II

15

   Stage III

1

   Stage IV

1

  Recurrent lung cancer

18

   Localized

16

   Metastatic

2

Other histologies

4