The survey has been done on sample of 1252 people. The target was to estimate damage of noise on professional rehabilitation of deaf population, which is mostly directed to professions in heavy industry, for professions in metal industry. Sample has been divided to 3 sub samples: 137 hearing people in metal industry; 106 hearing impaired adults with different professions and control group of 1000 hearing people. The results of survey point that work conditions contribute to hearing damage at employers in metal industry by comparison with hearing impairment of usual population. By comparative analysis of registered hearing impairments concerning age, statistically important difference in frequency of hearing impairment of two sub samples (t= 3.27, sing=.05). The relation between hearing impairment and years of working has been identifi ed at employers in heavy industry, (r=.37).

Background Data on the epidemiology of hepatitis B and C in Bosnia and Herzegovina (B&H) are lacking. Objectives To assess the prevalence of hepatitis B surface antigen (HBsAg) and anti-hepatitis C virus (anti-HCV) in blood samples of first time blood donors in a well-defined region of B&H. Our secondary goal was to estimate the prevalence of HBsAg and anti-HCV in the general population of the same region. Patients and Methods We evaluated 8196 blood samples for the presence of HBsAg and/or anti-HCV, adjusted for differences in gender, and used the ratio estimation method to determine the prevalence in the general population. Results We analyzed 1263 (15.4%) female and 6933 (84.6%) male blood donors (male-to-female ratio: 5.49 to 1). The adjusted prevalence of HBsAg among blood donors was 0.787% (95% CI = 0.535-1.038), while the prevalence of anti-HCV was 0.267% (95% CI = 0.016-0.519). There was no difference in the prevalence of HBsAg or anti-HCV between men and women. We estimate that the prevalence of HBsAg and anti-HCV in the general population is 1.057% to 1.535% and 0.29% to 0.89%, respectively. Conclusions The prevalence of HBsAg and anti-HCV among blood donors suggests that our region has low endemicity for both hepatitis B and hepatitis C.