Table 1 Patient Characteristics

Total number

19

10

11

Gender

   Male

13

6

5

   Female

6

4

6

Median Age, y (range)

55 (38-87)

56 (40-76)

47 (35-73)

   ≥ 65

6

4

1

   < 65

13

6

10

No. of brain metastases

   1

10

4

5

   2

9

3

2

   3

0

2

4

   4

0

1

0

Primary tumor

   Non-small-cell lung cancer

10

6

4

   Small-cell lung cancer

2

2

6

   Breast cancer

1

2

0

   Other

6

0

1

Control of primary tumor

   Controlled

16

6

9

   Uncontrolled

3

4

2

Extracranial metastasis

   No

7

2

8

   Yes

12

8

3

Karnofsky Performance Score

   ≥ 80

10

3

7

   < 80

9

7

4

RPA class

   1

4

1

7

   2

12

8

4

   3

3

1

0

Hypofractionated stereotactic radiotherapy (HSRT) Boost

13

1

9