Legislative Decree 81/2008 requires the evaluation of occupational stress level in major companies and organizations. In fact occupational stress evaluation refers to the identification of an occupational risk factor: otherwise, the evaluation of stress level could include also general lifestyle factors. 110 workers have been investigated on stress perception. Occupational and non occupational stress perceptions have been evaluated with three questionnaires. Significant results (p < .01) indicate that occupational stress is not independent from non-occupational stress. Stress level evaluations could be considered only as an indicator of individual stress in an organization, however they do not prove that such stress is of organizational origin.
Keywords: Occupational stress, risk, safety, perception, transport company.