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. 2020 May 14;40(5):BSR20190629. doi: 10.1042/BSR20190629

Table 2. Demographic parameters of brain tumor cases and controls.

Variables Cases (n=250) Controls (n=250) Tumor tissues (n=96)
Age (years)
Median (range) 42 (8–88) 47 (9–88) 45 (21–71)
Age
≤30 62 (24.8%) 49 (19.6%) 12 (12.5%)
>30 188 (75.2%) 201 (80.4%) 84 (87.5%)
Gender
Males 165 (66%) 172 (68.8%) 59 (61.5%)
Females 85 (34%) 78 (31.2%) 37 (38.5%)
Smoking
Smokers 83 (33.2%) 120 (48%) 44 (46%)
Non-smokers 167 (66.8%) 130 (52%) 52 (54%)
Family history
Positive 26 (10.4%) - 13 (14%)
Negative 224 (89.6%) - 83 (86%)
Brain tumor types
Glioma
Diffuse astrocytoma (II)
Anaplastic astrocytoma (III)
Choroid glioma (II)
Oligodandroglioma (II)
Anaplastic oligodandroglioma (III)
GBM (IV)
Diffuse medine glioma (IV)
Eppendoma (II)
170 (68%)
35
64
25
06
04
27
06
03
- 68 (70.8%)
07
19
12
05
03
11
04
07
Meningioma
Meningioma (I)
Atypical meningioma (II)
Anaplastic meningioma (III)
64 (25.6%)
21
30
13
- 21 (21.9%)
09
08
04
Pituitary adenoma
Grade II
Grade III
16 (6.4%)
09
07
- 07 (7.3%)
04
03
Tumor grade
Grade I 21 09
Grade II 108 43
Grade III 88 29
Grade IV 33 15
Ionizing radiation
Exposed 24 (9.6%) - 16 (16.7%)
Unexposed 226 (90.4%) - 80 (83.3%)