4.

2015年-2018年LDCT参与率及检出率趋势分析

LDCT participation rate and detection rate trend analysis in 2015-2018

Year	LDCT participation rate	Detection rate of positive nodules	Detection rate of confirmed lung cancer
2014-2015	16.67% (1, 157/6, 941)	11.06% (128/1, 157)	0.26% (3/1, 157)
2015-2016	35.11% (3, 187/9, 077)	4.93% (157/3, 187)	0.13% (4/3, 187)
2016-2017	34.77% (2, 721/7, 825)	7.02% (207/2, 721)	0.29% (8/2, 721)
2017-2018	38.70% (3, 089/7, 981)	7.61% (295/3, 089)	0.39% (12/3, 089)
χ2	682.68	0.12	2.58
P	< 0.001	0.73	0.11