Clinical significance of low-dose CT performed for three consecutive years in diagnosis of lung nodules in coal mine workers with 20 working years
10.3760/cma.j.issn.1001-9391.2017.09.009
- VernacularTitle: 低剂量CT检查20年以上工龄煤矿工人肺结节的意义
- Author:
Jiangang LI
1
;
Xinhui CHEN
;
Hao GE
;
Xia QIN
;
Xiaogang JING
;
Guzhi WANG
;
Dongwei MAO
;
Guangyi ZHUANG
;
Baoqiong ZHAO
Author Information
1. Department of Radiology, China Ping Mei Shen Ma Medical Group General Hospital, Pingdingshan, Henan Province 467000, China
- Publication Type:Case Reports
- Keywords:
Low-dose CT;
Multiphastic screening;
Pulmonary nodule, solitary
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2017;35(9):679-682
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the clinical significance of low-dose CT (LDCT) in coal mine workers with relatively long working years.
Methods:A total of 907 coal mine workers with ≥20 working years were enrolled, among whom there were 863 male and 44 female workers with a mean age of 49.5 years. Digital radiography (DR) was performed for these workers in 2013, and LDCT was performed for three consecutive years from 2014 to 2016.
Results:A total of 32 workers were found to have lung nodules by DR in 2013, while in 2014, 269 workers were found to have non-calcified lung nodules by LDCT, and there was a significant difference in the number of workers with lung nodules (χ2=233.73, P<0.005) . There was also a significant difference in the detection rate of nodules between the workers with different working years of dust exposure (χ2=6.648, P=0.00) . The male workers had a significantly higher detection rate of nodules than the female workers (χ2=5.690, P=0.017) . There was no significant difference in the number of nodules between workers with different types of work (χ2=16.985, P=0.05) . There were 443 lung nodules in total, among which 71.56% were solid nodules and 55.75% had a size of ≤4mm; malignant nodules were confirmed by surgery in 6 (0.66%) of the 907 workers after baseline LDCT. LDCT reexamination in 2015 and 2016 found new nodules in 8 workers and enlarged nodules in 3 workers, and there was no significant change in the number of nodules with a size of ≤4 mm.
Conclusions:It is necessary to perform high-risk population screening for coal mine workers by LDCT. The follow-up strategies for nodules with a size of ≤4mm are the same as those for negative results; annual reexamination is recommended for nodules with a size of >4-8 mm, and clinical treatment should be considered for nodules with a size of >8 mm.
