Association of Kinase-Insert-Domain-Containing Receptor Polymorphisms with Glioma Susceptibility in a Chinese Population: A Hospital-Based Case-Control Study

Table 1

The demographical features at baseline in all patients.

Characteristics	Case group (n = 465)	Control group (n = 527)
Gender, n (%):			0.327
Men	272 (58.5)	292 (55.4)
Women	193 (41.5)	235 (44.6)
Age, years, means (SD)	42.22 (15.46)	40.20 (16.30)	0.046
Age group, n (%):			<0.001
<18 years	33 (7.1)	29 (5.5)
18∼39 years	156 (33.5)	255 (48.4)
40∼59 years	208 (44.7)	157 (29.8)
≥18 years	68 (14.6)	86 (16.3)
Cigarette smoking^a, n (%):			0.572
Never	258 (55.5)	333 (63.2)
Ever	59 (12.7)	63 (12.0)
Current	109 (23.4)	127 (24.1)
Missing data	39 (8.4)	4 (0.7)
Family history of cancer, n (%):			0.378
No	344 (74.0)	424 (80.5)
Yes	82 (17.6)	87 (16.5)
Missing data	39 (8.4)	16 (3.0)