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. Author manuscript; available in PMC: 2016 Jan 5.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2014 Sep 26;90(3):526–531. doi: 10.1016/j.ijrobp.2014.07.002

Table 3. Median survival time (MST) in months, by treatment, GPA, and number of metastases.

WBRT WBRT + SRS
n MST (95% CI) n MST (95% CI) P value
Overall 126 5.8 (4.7-6.8) 126 5.7 (4.6-8.6) .21
 GPA <3.5 104 5.4 (3.3-6.3) 101 5.0 (3.2-6.5) .97
 GPA 3.5-4.0 22 10.3 (5.3-19.4) 25 21.0 (10.5-36.0 .05
1 metastasis 73 5.0 (3.0-6.2) 70 6.6 (4.6-11.2) .07
 GPA <3.5 56 3.3 (2.2-5.3) 52 5.4 (3.4-6.6) .16
 GPA 3.5-4.0 17 11.4 (4.7-23.1) 18 21.0 (10.0-36.0) .21
2-3 metastases 52 6.7 (5.7-9.1) 55 5.3 (2.7-9.0) .92
 GPA <3.5 47 6.5 (5.4-9.1) 48 4.0 (2.5-7.9) .26
 GPA 3.5-4.0 5 8.9 (2.4-14.6) 7 14.1 (1.7-36.0) .10

Abbreviations: CI = confidence interval; GPA = graded prognostic assessment; SRS = stereotactic radiosurgery; WBRT = whole-brain radiation therapy.