• assessment
  • Data from three studies of Vermont granite workers, South African gold miners, and California diatomaceous earth mining and processing workers were used to illustrate methodological shortcomings in the quality of exposure assessment, control of confounders such as other workplace exposures and cigarette smoking, and the use of pulmonary fibrosis as a precursor to lung cancer. (cdc.gov)
  • issues
  • However, there are various methodological issues inherent to longitudinal morphometry in TBI. (frontiersin.org)
  • Study design considerations include how to best capture the target behaviors through selection of a controlled experimental laboratory environment versus home mealtime, duration of video recording, number of observations to achieve reliability across eating episodes, as well as technical issues in video recording and sound quality. (biomedcentral.com)
  • bias
  • The first goal of this paper is to briefly overview the following methodological considerations in longitudinal morphometry of TBI: lesion evolution (structural changes in lesion over time), neurosurgical procedures (surgery on central nervous system), power (probability to detect changes when they are truly present), bias (directional error in parameter estimation), and non-linearity (relationship that cannot be described by the first degree equations). (frontiersin.org)
  • main
  • The aim of this work was to evaluate the repeatability and the validity of a food frequency questionnaire (FFQ), and to discuss the methodological framework of such procedures.The semi-quantitative FFQ included 69 questions regarding the frequency of consumption of all main food groups and beverages usually consumed and 7 questions regarding eating behaviors. (edu.au)