Quackery is largely confined to the professions of medicine and religion, because less capable of exposure or demonstration.
Benzene was considered either as a continuous variable, using the log-transformed values because of the skewed distribution of exposure, or as a variable whose categories corresponded to exposure tertiles defined on the whole population with an exposure estimate.
Much of its recipes, people and produce are undiscovered for reasons of remoteness, lack of exposure, or simply because it's lost in translation.
In it, 18,000 people who were at an increased risk of lung cancer because of asbestos exposure or smoking received a combination of vitamin A and beta carotene, or a placebo.
Children included in the analysis (n = 344) were similar to those excluded (because of missing exposure or outcome data or because of preterm birth, n = 138) with respect to most characteristics, except for a higher prevalence of girls (51.7% vs. 40.6%) [see Supplemental Material, Table 1 (http://dx.doi.org/10.1289/ehp.1103862)].
Also, some of the estimated temperature-related mortality may arise as a result of short-term mortality displacement (harvesting), whereby the deaths of already frail individuals are brought forward by only a few days or weeks because of exposure to hot or cold weather (Hajat et al. 2005).
Table 1 shows the characteristics of included participants compared with 1) those of participants excluded because of missing exposure or confounder data (but for whom AMH measurements were available) and 2) all female adolescents who attended the 14 16 year clinic.
For example, a federal agency could periodically test employees, with their consent, to see if they had suffered chromosomal damage or genetic alterations because of exposure to radiation or toxic substances in the workplace.
Most people above 60 years of age display M. tuberculosis-specific immunity because of vaccination, exposure, or both.
