The study of correlation between lead pollution and the incidence
rate in boys suggests a lack of correlation between the number of
cases and the level of pollution in the study area.
Correlation trends for boys are similar to those for the general
population.
The study of the correlation between pollution and incidence
levels in the case of girls reveals an even more noticeable lack of such
dependence. In this respect, the lack of correlation becomes even
more profound over time.
The study of the correlation for cadmium pollution indicates a lack
of correlation with the incidence rate.
Incidence rates among the general population in the years 2000–
2004 seem to be decreasing in successive years in the entire study
area, with the exception of the central part of the province, where a
slight correlation between the toxin concentration level and the
higher incidence rate was observed (0.3). Incidence rates in boys
follow the trend in the general population and, additionally, the rates
have been shown to be increasing when considering the relationship
with the lead-related air pollution. No such relationship can be