When differences in exposure between categories are small, exposure misclassification is likely to be relatively influential.
Our sample size in any year was small, exposures were dropping rapidly and the principal difference in biomarker levels seen in the present study was between subjects enrolled in 2001 2002 and 2003 2004.
Fluoride and bladder cancer would be a pig to research as the effect size is small, the exposure runs over half a century, and the outcome - bladder cancer - takes a lifetime to reveal itself.
Although nonresidential exposure to BC not captured in the prediction model may have introduced some exposure measurement error, we believe that this error is small compared with exposure misclassification introduced from the use of fixed ambient monitoring data, which is the traditional exposure assessment method in large air pollution studies.
Our data show that exposure to acrylamide from consumption of STPs is small compared with exposure from food consumption or cigarette smoking.
The first possibility which is the low diffusivity for CO2 in shale reservoirs conditions can be explained by two ways: (1) The contact area between the injected CO2 and formation oil is small (2) The exposure time between the injected CO2 and the formation oil is short.
First, for populations where the prevalence of alcohol and/or tobacco consumption is high, even if the relative risk associated with these exposures is small, the effect of these exposures could still account for a substantial number of breast cancer cases.
"It [glyphosate residues] are found in some samples of bread, but the exposure is small.
Carney seemed mildly relaxed about the Russian threat – UK banks' direct exposure is small and Russia is less linked to the global financial system than it was at the time of the 1998 debt default.
Though this exposure is small, he recognized as very likely that much more of it was buried under younger deposits.
