In the last decade in Japan the number of newly compensated cases of occupational diseases has stopped declining and is fluctuating between 7,000 and 9,0001). Excluding pneumoconiosis and asbestos related cancers, the incidences of typical occupational diseases relating to chemical exposures have almost been eliminated from the statistics and almost all the reported cases are from acute poisonings. Recently we studied the incidence of compensated cases of organic solvent poisoning in Japan, and reconfirmed that almost all cases were acute poisoning and no cases of typical occupational diseases or related chronic diseases. This may depend on the fact that this statistics rely on cases that had more than 3 d off from work by the disease and not including mild cases. Considering the recent trend, it is becoming clear that the statistics we can get is not sufficient for making provision for the further prevention. For example, important issues of organic solvent poisoning among developed countries nowadays are chronic poisoning in subclinical state or symptoms at mild state, which will decrease the working abilities of the workers to some extent and might develop severe diseases in some cases. Skin diseases excluding chemical burn2) and chronic neurological disorders3) are well recognized targets. We have no reliable national statistics on these disorders. Great Britain has the most advanced health statistics system on occupational health4). The system includes Industrial Injuries Disablement Benefit (IIDB) statistics on compensated cases, Self-reported Work-related Illness (SWI) statistics derived from the national sampling surve
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