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Table 2 Univariate analyses for survival (Log Rank test)

From: Whole brain radiotherapy for brain metastases from breast cancer: estimation of survival using two stratification systems

Variable Number Event (n) % P
AGE 132 106 OS 12 months 0.16
< 65 Years 42 36 34.8  
>= 65 Years    29.3  
KPS     <0.0001
< 70 89 75 21.7  
>= 70 85 67 45.8  
SURGICAL RESECTION     <0.0001
Yes 27 20 66.7  
No 147 122 26.9  
DOSE(Gy)
FRACTIONATION (fr)
    0.11
40 Gy/20 fr 66 55 27.6  
30 Gy/10 fr 108 87   
NUMBER LESIONS     0.003
Single 66 51 43.8  
Multiple 108 91   
CHEMOTHERAPY     0.29
Yes 32 27 47.8  
No 142 122 28.4  
RPA CLASS     < 0.0001
Class I 39 28 55.6  
Class II 46 39 37.7  
Class III 89 75 21.7  
PRIMARY DISEASE CONTROL     0.002
Yes 86 62 46  
No 88 80 22.8  
EXTRA CRANIAL METASTASIS     30.001
Yes 80 50 23.  
No 94 92 49  
BS-BM     < 0.0001
Score 0 34 33 11.8  
Score 1 54 52 24.1  
Score 2 61 44 42.6  
Score 3 25 13 69.2