A contribution to the study of fluoride excretion.

Three population groups (two of them consisting of school-going children) with a low content of fluoride in the drinking water have been used to investigate parameters influencing fluoride excretion. For the population living in an area contaminated by F-air pollution, there was no significant effect of age or sex from 3 to 17 years. For the population living in a non-contaminated area, there is an increase with age. The data are distributed according to log normal. To determine these excretion levels, first-morning samples were used and it is concluded that for population research (not necessarily for individuals) this is more practical than 24-h samples and yield reliable results. To correct for urine concentration, correlation with Ca2+, Cl- and creatinine were investigated. Low or insignificant correlations were obtained.