It typically involves selecting working people with particular jobs as your subjects. The advantage based on this is that, workers have often substantially higher exposures to specific risk factors than the typical population. The disadvantage is that workers with various jobs differ substantially in terms of risk, like the rich, elderly or disabled (Ingleby, 2012). This makes it very difficult to generalize to populations with some nonworking people. Risk factors in this would include workers being exposed to variety of chemicals, stress and poor ventilation or the air quality and finally many people exposed to the risk factors that may be of interest may be much smaller in the work place than they are in the
It typically involves selecting working people with particular jobs as your subjects. The advantage based on this is that, workers have often substantially higher exposures to specific risk factors than the typical population. The disadvantage is that workers with various jobs differ substantially in terms of risk, like the rich, elderly or disabled (Ingleby, 2012). This makes it very difficult to generalize to populations with some nonworking people. Risk factors in this would include workers being exposed to variety of chemicals, stress and poor ventilation or the air quality and finally many people exposed to the risk factors that may be of interest may be much smaller in the work place than they are in the