Survival Analysis of Coal Workers’ Pneumoconiosis (CWP) Patients in a State-Owned Mine in the East of China from 1963 to 2014
by
Lei Han 1,2,†, Qianqian Gao 1,†, Jingjin Yang 2,3,†, Qiuyun Wu 2, Baoli Zhu 1, Hengdong Zhang 1, Bangmei Ding 1 and Chunhui Ni 2,*
Lei Han 1,2,†, Qianqian Gao 1,†, Jingjin Yang 2,3,†, Qiuyun Wu 2, Baoli Zhu 1, Hengdong Zhang 1, Bangmei Ding 1 and Chunhui Ni 2,*
1
Institute of Occupational Disease Prevention, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210028, China
2
Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing 210029, China
3
Division of Health Risk Factor Monitoring and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Academic Editor: Paul B. Tchounwou
Int. J. Environ. Res. Public Health 2017, 14(5), 489; https://doi.org/10.3390/ijerph14050489
Received: 14 March 2017 / Revised: 27 April 2017 / Accepted: 28 April 2017 / Published: 6 May 2017
(This article belongs to the Section Global Health)
To investigate the mortality probability, life expectancy of coal workers’ pneumoconiosis (CWP), and related factors of life expectancy, a total of 495 patients with CWP were diagnosed and reported from 1963 to 2014 in a state-owned mine in the east of China. The life table method, log rank method, and Cox regression model were used for survival analysis. 95 out of 495 CWP died during this period. The mortality rate was 19.19%. The average life span was 12.1 (0.0–33.2) years and average death age was 57.4 (33.0–83.0) years. The life table indicated that overall mortality probability increased with the age of CWP patients. Life expectancy of CWP patients was prolonged to 4.3, 1.4, 1.2, and 1.4 years without death caused by pneumoconiosis, tuberculosis, lung cancer, and pulmonary heart disease respectively. The survival curve of CWP patients without pulmonary tuberculosis was higher (average 37.9 years) than patients with pulmonary tuberculosis (average 34.1 years). There was significant difference observed (χ2 = 6.196, p < 0.05). Three risk factors that include initial dust exposure year, age of onset, and first diagnostic stage were put into the Cox regression model for evaluation. The data indicated that prevention and treatment of CWP complication is important to improve patients’ survival rates.
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Keywords:
survival analysis; Coal Workers’ Pneumoconiosis (CWP); China
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MDPI and ACS Style
Han, L.; Gao, Q.; Yang, J.; Wu, Q.; Zhu, B.; Zhang, H.; Ding, B.; Ni, C. Survival Analysis of Coal Workers’ Pneumoconiosis (CWP) Patients in a State-Owned Mine in the East of China from 1963 to 2014. Int. J. Environ. Res. Public Health 2017, 14, 489.
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