Reassessment of burden of occupational fatal injuries in Italy, 1951-2017

BACKGROUND: occupational injuries in Italy are registered primarily by the Italian National Institute for insurance against accidents at work (Inail); its statistics show the number of events by consequence type (temporary, permanent, fatal). Data prior to 2001 include fatalities only if benefits were paid to survivors entitled to compensation, typically spouse and/or children. OBJECTIVES: to estimate the number of fatal injuries occurred to workers without survivors entitled to compensation, not considered in INAIL statistics for the period 19512000; to evaluate years lived with disability (YLD) years of life lost (YLL), disability-adjusted life years (DALY) caused by all occupational injuries occurred in Italy, period 1951-2016. DESIGN: evaluation of the stability of the ratio among fatal accidents with and without survivors, along the period of observation (2001-2017); retrospective application of such ratio to data related to the period 1951-2000; linkage of individual injury data to Global Burden of Disease injury categories and calculation of corresponding YLLs, YLDs, DALYs; calculation of mean values by main type of consequences (temporary, permanent, fatal); application of above means to Italian data 1951-2017. SETTING AND PARTICIPANTS: occupational injuries compensated by Inail in Italy, 1951-2017. MAIN OUTCOME MEASURES: number of injuries, YLDs, YLLs, DALYs. RESULTS: fatal occupational injuries, not considered in official statistics for the period 1951-2000, are estimated to be 26,218 cases, corresponding to 1.4 millions of YLLs. In the same period, total occupational injuries (with temporary, permanent or fatal consequences) correspond to 11.5 millions of DALYs, fatal component corresponded to 5.1 millions of YLLs. CONCLUSIONS: Estimated total number of fatal occupational injuries in 1951-2000 is 28% higher than official Inail data. Considering YLLs, such increase rises up to 37%. Such difference reflects younger mean age and consequent longer life expectancy of workers without survivors. Considering DALYs, the increase is 14%. Throughout the period 1951-2017, a progressive reduction of the burden of injury is observed. At the same time a qualitative change is observed, with reduction from 55% to 30% of YLL/DALY ratio.