2.

接受LDCT筛查人群的性别、年龄分布

Gender and age distribution of receiving LDCT screening population

Items	High risk population (n)	Screening population (n)	Participation rate (%)	χ2	P
LDCT: low-dose computed tomography.
Gender				1, 648.59	< 0.001
Male	20, 924	5, 074	24.25
Female	10, 900	5, 080	46.61
Age groups (years)				65.88	< 0.001
40-	10, 846	3, 144	28.99
50-	12, 264	4, 104	33.46
60-	8, 716	2, 906	33.34
Total	31, 824	10, 154	31.91