Epidemiological investigation on newly diagnosed occupational welder's pneumoconiosis in shipbuilding industry in Guangzhou City from 2006 to 2022
Objective To analyze the epidemiological characteristics of newly diagnosed occupational welder's pneumoconiosis(OWP)in the shipbuilding industry in Guangzhou City from 2006 to 2022.Methods Data on newly diagnosed OWP cases in the shipbuilding industry in Guangzhou City from 2006 to 2022 was collected and ananlyzed from the Health Hazard Monitoring Information System subsystem of the Chinese Disease Prevention and Control System.Result A total of 250 cases of new welder's pneumoconiosis were diagnosed in the shipbuilding industry in Guangzhou City from 2006 to 2022.The number of new cases per year showed an initial increase followed by a rapid decline,reaching a peak in 2013(65 cases).Most of the cases were male,accounted for 99.2％.There were 220 cases reported the OWP stage,with the stage Ⅰ and stage Ⅱ cases accounted for 93.6％and 6.4％,respectively,but no stage Ⅲ cases were reported.The median(M)age and the 25th and 75th percentiles(P25,P75)at diagnosis was 43.0(39.0,47.0)years and the dust exposure years M(P25,P75)was 11.2(8.1,14.7)years.The M of age at diagnosis of new OWP cases in 2015-2018 and 2019-2022 were higher than those in 2006-2010 and 2011-2014,respectively(all P＜0.05).The M of dust exposure duration of new OWP cases from 2006-2010 and 2019-2022 was higher than that in cases from 2015-2018 and 2011-2014,respectively(all P＜0.05).Most of the small shadows of the cases were circular small p shadows and distributed in the bilateral middle and lower lung zones,with a density mostly of 1/1,according to the X-ray chest films.Conclusion The hazard of welding fumes in the shipbuilding industry in Guangzhou City has been controlled,but the prevention and control of OWP among welders remains severe.
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