Our analyses suggest that an ecologic study
on lung cancer and radon exposure in BC might reach divergent conclusions depending on whether the radon potential map or the radon observations were used for exposure assessment.
During the ecologic study
, 126 rodents were captured: 68 (53.
Nevertheless, the hypotheses generated from this ecologic study
need further confirmation by subsequent analytic studies.
Given the methodological aspects of ecologic study
design, studies of this nature (eg, environmental contaminant and disease outcome) should be interpreted with caution.
Lieberman was found by the National Institute of Health (NIH) in October of 2006 to contain several serious flaws that were "judged to reduce the usefulness of an ecologic study
design using the VSD (Vaccine Safety Database) to address the potential association between thimerosal and the risk of Autism Spectrum Disorders.
Streptococcal resistance is directly associated with antibiotic use, a multinational ecologic study
Hillier and her associates also conducted an ecologic study
of 2,110 individuals, which showed no correlation between hip fracture among residents of areas with highly fluoridated water and those living elsewhere.
3) study utilized TABULAR DATA OMITTED the ecologic study
design to investigate the relationship between exposure to air emissions produced by the petroleum and chemical industries and average annual cancer incidence among residents of Contra Costa County.
This ecologic study
collated school-aggregated data from three sources.
Their ecologic study
design cannot be used to determine causation, and their recommendation to change lead screening strategies based on their study seems premature.
We cannot determine a causal relationship because of the nature of the ecologic study
that we used in this research.
We did not use an ecologic study
design in our analysis.