ABSTRACT
Synthetic fibers of rockwool are deciphered from Basalt stone. Chemical, physical and biological similarities with asbestos detain scientists to consider effects and complications caused by rockwool in lung. This historical cohort research was designed to state impact of rockwool on radiographic findings of lung and its spirometric changes. Encountered group, "Iran Rockwool Factory" was selected by simple random sampling technique and matched with comparison group, "Minoo Confectionery Factory", regarding age and cigarette smoking. Medical and occupational histories, clinical examinations and all spirometries were carried out in health centers of the two factories. Chest x-ray was taken for all subjects of the two groups. All data were gathered and registered in designed questionnaires. Although a significant discrepancy existed in dyspnea, non cardiac chest pain and wheeze, there was not any statistically significant difference in radiographic findings and spirometric parameters between the two groups. We do not have enough evidence to support the adverse effects of rockwool on respiratory function and significant observable radiographic changes in chest x-ray