WBRT + SRS SRS Only p-value
White matter score at baseline
1 11 (78.6%) 44 (90.0%) 0.3609
2 3 (21.4%) 5 (10.0%)  
3 0 0  
White matter score at 1yr
1 4 (28.6%) 43 (87.8%) <0.0001
2 8 (57.1%) 6 (12.2%)  
3 2 (14.3%) 0  
White matter score at 2yr
1 1 (25.0%) 15 (83.3%) 0.0458
2 2 (50.0%) 3 (16.7%)  
3 1 (25.0%) 0  
Table 2: White matter change following treatment for brain metastases.