Table 1 Patients’ characteristics

Gender

N.S.

 Female

2.9 M

 Male

2.1 M

Age

p = 0.0002

 30–49

7.0 M

 50–69

2.5 M

 70–90

1.5 M

KPS

p = 0.0001

 90–100%

5.2 M

 70–80%

2.5 M

 < 70%

1.2 M

Time of occurrence

N.S.

 Synchronous with primary

2.8 M

 After primary

2.4 M

Hospitalization

p = 0.0001

 Yes

0.9 M

 No

3.5 M

Number of brain metastases

p = 0.031

 Singular/solitary

3.7 M

  ≤ 3

2.6 M

  > 3 or bulk

2.3 M

Primary disease status

p = 0.0244

 Controlled primary

3.8 M

 Uncontrolled primary

2.3 M

Tumor site (3 most common and other)

N.S.

 NSCLC

2.5 M

 SCLC

2.4 M

 Breast cancer

2.9 M

 Other