This survey was aimed at showing the relationship between some working organizational indicators--work-related stress "sentinel events" such as sick leaves and work accident--and some sociodemographic (gender, age) and organizational (homogeneous tasks, departmental areas) parameters. In the decade 2001-2010 a progressive decrease of the absenteeism and work accident rates was evidenced. The absenteeism rate was inversely related to job-qualification and it was higher among female workers. The highest requests of medical visits by auxiliary personnel showed a lower adaptation to job content, looked upon as low-rewarding in this homogeneous task.