The purpose of this paper is to examine the fluctuations of accident f
requency in the Italian industry during a period of time covering almo
st a hundred years (from 1890 to 1989) and to examine possible connect
ions with industrial production fluctuations. Notwithstanding the cons
iderable variations of economic and social conditions and the increasi
ng technological and scientific improvement, the number of accidents n
ever drops below 110 cases per 1000 workers/year. We focused our atten
tion on economic factors, which, especially over the long run, seem to
be the most important, so as to set the basic trends in occupational
accidents. A nice parallelism between the economic cycle and the trend
of accidents has been pointed out, differences not exceeding 20% over
the whole period of observations. This relationship affords the oppor
tunity to verify that the factors influencing human safety conditions
in industrial activities do not depend on technological development.