[Assessment of the risk of occupational biomechanical overload: comparison of methods currently used].

The Occupational Health Department of Bergamo Ospedali Riuniti and Occupational Health Public Services set up a project in order to check the health surveillance quality in noise exposed workers. 887 hearing threshold tests, performed between 1998 and 2002, were examined; the audiograms concerned 304 workers exposed to industrial noise higher than 85dB(A), employed in 22 textile, mechanical, wood, stone, building and paper industries. After examining the 887 audiograms we noticed that the health surveillance of noise exposed workers up to now, 14 years after the issuing of the Legislative Decree 277/91, reveals many critical situations, showing an inadequate accuracy and possibility of interpretation of the audiometric tests.