Correlation between some parameters of lead absorption and lead intoxication

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Waldron, H. A. (1971).Brit. J. industr. Med.,28, 195-199. Correlation between some parameters of lead absorption and lead intoxication. Use has been made of data collected over a number of years from workers exposed to a lead hazard in a motor-car factory. The correlations between various parameters of lead absorption and lead intoxication were computed, including blood and urine lead concentrations, urinary coproporphyrin, ALA and PBG concentrations, and haemoglobin concentration. In all, 15 correlation coefficients were calculated, of which only six showed a statistically significant result (i.e., P<0·05). These six were blood lead and urine lead (r = 0·38, P<0·001), urine lead and coproporphyrin (r = 0·42, P<0·001), urine lead and ALA (r = 0·43, P<0·001), coproporphyrin and ALA (r = 0·75, P<0·001), ALA and PBG (r = 0·49, P<0·001), and urine lead and PBG (r = 0·19, P<0·05).

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