Respiratory effects of silica inhalation among marble industry workers

Among the currently disabling occupational diseases 60% are attributed to the respiratory system, with 85% of cases related to silicosis. Objective: This study assesses the respiratory effects of occupational silica inhalation among marble industry workers. Methods: 21 workers employed in the marble industry in the town if GurupiTO between March and May 2012 answered a questionnaire about their respiratory symptoms and smoking habits. All underwent spirometry. For intergroup comparison of smokers, ex-smokers, and nonsmokers the parametric ANOVA test was used and for other analyzes the nonparametric Fisher test, with a significance level of 5% probability. Results: The average age of workers was 27±6 years. The prevalence of symptomatic patients was 57%. Comparing the two groups for the presence or absence of symptoms by length of exposure to silica ( > or < than 5 years), smoking status, BMI, and spirometric variables obtained, there was no statistical significance. Conclusions: no association between the detected symptoms and exposure to silica could be identified. This does not exclude its probable interaction and reinforces the need for more specific studies, such as serial spirometry associated with lung volume analysis or cardiorespiratory fitness tests and exercise tests for a broader assessment targeted at these individuals.