Work hygienic behaviour as modifier of the lead air-lead blood relation

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Abstract
Knowledge of hygienic behaviour at the workplace appears to explain the low correlation between external and internal exposure. Differences in hygienic behaviour explain at least the same magnitude of variation in levels of lead in blood as the level of lead in air. Adding hygienic behaviour to the lead air-lead blood model increases the accuracy of prediction of PbB. In this study, the frequency of putting on/off gloves and the frequency of hand-mouth nose/shunt are the strongest modifiers of the PbA-PbB relation. In general, the actual behaviour of workers exposed to chemical agents may explain the often observed poor or moderate relationships between environmental and biological monitoring parameters of chemical exposure in occupational health studies.

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