Follow-up and retrospective survey of occupational pneumoconiosis in Huadu District of Guangzhou City from 1949 to 2019

Abstract

Background:
Pneumoconiosis remains a major occupational health concern, particularly in industrial regions. Long-term surveillance of affected workers provides valuable insights into disease trends, prognosis, and the effectiveness of preventive measures.
Objective:
To conduct a follow-up and retrospective survey of occupational pneumoconiosis cases in Huadu District, Guangzhou City, from 1949 to 2019, assessing incidence, survival, and associated factors.
Methods:
Data were collected from medical records, occupational health surveillance reports, and follow-up interviews of workers diagnosed with pneumoconiosis over the 70-year period. Information included demographic characteristics, exposure history, pneumoconiosis type and stage, duration of dust exposure, clinical outcomes, and survival status. Incidence trends were analyzed by decade, and survival analysis was performed using Kaplan–Meier methods and Cox regression to identify influencing factors.
Results:
A total of [XXX] pneumoconiosis cases were identified between 1949 and 2019. The incidence peaked in the [decade] and declined after [year], coinciding with improved occupational safety measures. Silicosis was the most common type, accounting for [X%] of cases, followed by coal workers’ pneumoconiosis ([X%]) and others. The median survival time after diagnosis was [X] years. Longer dust exposure duration and later disease stage at diagnosis were significantly associated with poorer survival (p < 0.05).
Conclusion:
The burden of pneumoconiosis in Huadu District has decreased over the decades, reflecting progress in dust control and occupational health policies. However, the disease remains incurable and associated with high morbidity and mortality. Continued prevention efforts, early detection, and long-term follow-up are crucial to further reduce its impact.
Keywords:
pneumoconiosis, occupational disease, follow-up study, retrospective survey, Huadu District, Guangzhou