Abstract
In Belgium the determination of urinary delta-aminolevulinic acid (ALA-U) in lead exposed workers has been generalised in industrial medicine. The insurance against occupational diseases also uses this criterion, amongst others, for evaluation of compensation claims. Although the insured population is very heterogeneous, the results gained on a large number of claimants for compensation are in accordance with the scientific literature on this matter. Regression comparison shows a semi-logaritmic relation with PbB. Furthermore, the expression of ALA-U in mg/g creatinine yields more valid results, mainly due to a smaller dispersion. On the basis of these regression equations, permissible limits of ALA-U of 6 mg/g creatinine and of 10 mg/g creatinine are proposed respectively for prevention and for compensation of work-incapacity in insurance medicine.
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