Characteristic Patients Control p value
n % n %
Age (yr) ≤ 10 3 3.3 6 4.6 0.932
11 to 20 13 14.4 11 8.5
21 to 30 8 8.9 18 13.8
31 to 40 23 25.6 31 23.8
41 to 50 17 18.9 28 21.5
51 to 60 17 18.9 24 18.5
> 60 9 10.0 12 9.2
mean ± SD 40.7 ± 16.9 (7, 70) 39.8 ± 15.6 (8, 67)
Gender Male 41 45.6 62 47.7 0.755
Female 49 54.4 68 52.3
Dwelling Rural 67 74.4 96 73.8 0.921
Urban 23 25.6 34 26.2
Smoker Yes 27 30.0 32 24.6 0.377
No 63 70.0 98 75.4
Histopathology Neuroepithelial Tissue Tumor 35 38.9      
Meningeal Tumor 27 30.0    
CNS Lymphoma 4 4.4      
Tumors of Sellar Region 6 6.7      
Metastatic Tumor 2 2.2      
Others 2 2.2      
Cranial Nerve Tumor 14 15.6      
Tumor Type Benign 47 52.2      
Malignant 43 47.8      
Tumor Grade Low 33 47.1      
High 37 52.9      
Vascularity Less Vascular 40 44.4      
Moderately Vascular 26 28.9      
Highly Vascular 24 26.7      
aPro/Pro+ Pro/Arg genotype frequencies vs. Arg/Arg genotype.
Table 1: Distribution analysis of selected demographic and risk factors in brain tumor cases and controls.