Pulmonary Functions and Related Factors in Shipyard Workers

Introduction
The purpose of this study was to evaluate the factors which affect to the pulmonary function in shipyard workers so that the result can provide the basic information of preventing and managing pulmonary disorders in the future.

Methods
We have studied respiratory symptoms, smoking history, chest radiography, and pulmonary function among 793 workers in two shipyards and its subcontractor from April 2009 to July 2009. The workers were subdivided into 3 groups by working process: welders, grinders, and machinist-managers. The data were analysed according to working process and other impact factors considered.

Results
Significant differences among the working process were shown from categories inquiring about dyspnea and coughs during the working hour and the hour of rising. In the pulmonary functions, there was significant differences in FEV1, FVC, PEF, and MMEF (except FEV1/FVC%) by working process. Especially, grinders showed significantly low figures in the indices of FEV1, FVC, and MMEF.

Discussion
Pulmonary function was significantly lower in grinders. It seems to be affected by exposure to a combination of dusts (silica, lead, and manganese) and irritant gases in the workplace. These results suggest that the workers and health officials should work together to adopt technical preventive measures, such as having well ventilated work areas and wearing appropriate respiratory protective devices.