Table 3 Correlation of factors with survival in BM patients

Age (in years)

18–30

1

0

3

7.747

.654

31–40

0

2

5

41–50

4

15

19

51–60

2

17

16

61–70

2

11

12

>70

0

2

5

Gender

Male

2

34

35

8.423

.015*

Female

7

13

25

Histopathology

SCLC

0

12

8

5.945

.429

Adeno

4

14

23

Squamous

1

9

11

Others

4

12

18

Extracranial metastases

Liver

1

3

5

2.409

.966

Bone

2

11

18

Adrenal

1

2

2

Multiple

3

22

24

None

2

9

11

Clinical presentation of brain Mets

Headache

4

26

34

5.618

.467

Seizure

1

3

11

Weakness

3

14

13

Asymptomatic

1

4

2

RPA

I

7

20

24

9.353

.05*

II

0

3

12

III

2

24

24

Number

Single

2

13

15

0.165

.921

Multiple

7

34

45

Location

Cerebrum

4

23

23

3.544

.738

Cerebellum

0

2

4

Multiple

5

22

31

Synchronous/metachronous

Synchronous

1

16

26

3.793

.03*

Metachronous

8

31

34

RT

WBRT

8

41

55

2.716

.844

WBRT+ Boost

0

2

1

SRS

1

3

4

SRT

0

1

0