OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (15): 2022-2026.

• Treatise—Occupational Health and Occupational Diseases • Previous Articles     Next Articles

Survival analysis of occupational pneumoconiosis patients in a district of Tianjin City from 1983 to 2023

HUANG Zhen, ZHANG Bingxu, ZHAO Chunlei   

  1. Tianjin Binhai New Area Center for Disease Control and Prevention(Binhai New Area Health Supervision Institute)Tianjin 300451, China
  • Received:2025-09-17 Revised:2025-11-27 Online:2026-08-01 Published:2026-07-16

Abstract:

Objective To understand the survival status and risk factors of occupational pneumoconiosis patients in a district of Tianjin City from 1983 to 2023,providing a basis for formulating pneumoconiosis prevention and control strategies. Methods Survival data for 360 occupational pneumoconiosis patients in a district of Tianjin City from 1983 to 2023 were obtained through the pneumoconiosis follow-up management system and the cause-of-death database. Joinpoint regression analysis analyze trends in case numbers and annual percentage changes(APC). The survival rate was calculated using the life table method,the Kaplan-Meier method was used to compare the survival curves of each group,and the COX proportional hazards model was used to evaluate the influencing factors. Results From 1983 to 2019,the number of occupational pneumoconiosis cases in a district of Tianjin City showed an increasing trend(APC=5.45%,P<0.05),while from 2019 to 2023,it exhibited a decreasing trend(APC=-51.41%,P<0.05). The median survival time for patients was 155 months. The survival curves of pneumoconiosis patients stratified by the following factors showed statistically significant differences(all P<0.05):work injury insurance status(presence/absence),pneumoconiosis type(silicosis/other types),complications(presence/absence),and age at initial diagnosis(≥60,50-<60,40-<50,0-<40 years). Multivariate Cox proportional hazards analysis revealed that patients without work injury insurance had a 3.766 fold higher risk of death compared to those with insurance,the mortality risk for patients aged 40-<50,50-<60,and ≥60 years at initial diagnosis was 4.174, 8.641,and 63.625 fold higher,respectively,compared to those aged 0-<40 years at initial diagnosis,patients with complications had a mortality risk 2.888 times higher than those without complications. Conclusion The survival time of pneumoconiosis patients is influenced by the age at initial diagnosis,comorbidities,and the presence of workers' compensation insurance. Early diagnosis and treatment,along with occupational health surveillance for elderly dust-exposed workers,are particularly crucial.

Key words: Occupational pneumoconiosis, Survival analysis, Cox proportional hazards model, Kaplan-Meier method, Incidence trend

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