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Table 1 Prognostic scoring systems (GPA, SIR, BSBM)

From: Gamma knife radiosurgery for elderly patients with brain metastases: evaluation of scoring systems that predict survival

 

GPA score

SIR score

BSBM score

 

0

0.5

1

0

1

2

0

1

Age

≥60

51-59

≤50

≥60

51-59

≤50

NA

KPS

<70

70-80

90-100

≤50

60-70

>70

50-70

80-100

Control of primary cancer

NA

PD

PR-SD

CR-NED

No

Yes

Volume of the largest BM (cc)

NA

>13

5-13

<5

NA

No. of BM

>3

2-3

1

≥3

2

1

NA

EC metastasis

(+)

 

(−)

NA

(+)

(−)

  1. BM; brain metastasis, CR; complete regression, EC; extracranial, KPS; Karnofsky performance status, NA; not available, NED; no evidence of disease, No.; number, PD; progression disease, PR; partial regression, SD; stable disease.