Current observational studies of personal contact with pollutants are being augmented by tools that truly set exposure science apart from environmental science or environmental quality, namely, the mechanistic studies of human activity patterns and behavior in adults and children (Freeman et al. 1997; Klepeis et al. 2001; Reed et al. 1999; Schwab et al. 1991; Zartarian et al. 1997).
Adibi et al. (2008) reported that for phthalates, the probability of correctly classifying a woman into a low-exposure group based on a single urine sample, if she truly had low exposure based on multiple measurements, was between 0.43 for monoethyl phthalate (MEP) and 0.95 for mono-isobutyl phthalate (MiBP).
It's unclear if truly safe UV exposure can ever be achieved.
Yet few companies can quantify just how great their cyber risk exposure truly is, preventing them from effectively protecting themselves.
Shorter duration of breast-feeding increases infant mortality (Gartner et al. 2005; Leon-Cava 2002); if DDT exposure truly shortens lactation, this has public health importance.
Derivation of this cell line for the first time allowed the in vitro study of the effects of truly long-term exposure of human precursor cells to cytostatic drugs on DC differentiation.
The proportion of men with truly comparatively low exposure (tertiles 2 and 3) that were classified correctly (i.e., specificity) ranged from 0.83 for MEHP to 0.90 for MMP.
In doing so, environmental managers would avoid confounding variance potentially due to population-specific inherent susceptibility, or alternatively, resistance to disease, and that which is truly symptomatic of exposure to contaminants.
There was no compensatory increase in referrals to other services that could address function (e.g. occupational therapy, geriatric medicine), indicating that the patients assigned to clerks without geriatrics exposure truly received less attention to functional issues.
If there were truly a monotonic exposure-response relationship, and those who were truly in the highest exposure level were misclassified as being in the middle exposure levels, it would appear that those in the middle exposure levels had the greatest risk of breast cancer risk.
Finally, controlling for confounding in cross-sectional research is often difficult because we cannot be certain whether the potential confounder is a result of the exposure-outcome association or truly associated with the exposure before the outcome develops [ 13].
