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Table 3 Analysis of factors predicting patient survival after 2-session SRS (Cox proportional hazards model)

From: A minimally invasive treatment option for large metastatic brain tumors: long-term results of two-session Gamma Knife stereotactic radiosurgery

Covariate

Hazard ratio (95% CI)

P value

Young (≤ 65 y/o)

0.591 (0.299-1.17)

0.130

High KPS (≥ 90)

0.803 (0.437-1.48)

0.480

Controlled Extra-CNS disease

0.151 (0.057-0.405)

< .001

Short interval from cancer diagnosis to SRS (≤ 12 months)

0.274 (0.127-0.593)

0.001

Single BM

0.330 (0.169-0.656)

0.002

  1. SRS = stereotactic radiosurgery, CI = confidence interval, KPS = Karnofsky performance status, CNS = central nervous system, BM = brain metastasis.