While selection bias happen because of the way we select the object study to build relationship or association between a suspected causative agent and disease or illness, observation bias is focused to the bias of the means of getting information about the study. This kind of bias is generally involved when you are doing retrospective epidemiological study. I suggest you visit that page to obtain more detail characteristics of retrospective epidemiological study.
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The most important thing for environmental toxicology study is to establish the association between a suspected causative agent and associated disease or illnesses. Several methods have been described in epidemiology and toxicology study. You have learned about fundamental difference between epiedemiology study and toxicology study. Now we will learn about one factor that should be cautiosly be addressed.
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This post will briefly describe about definition of carcinogens, mechanisms of actions, the sources of carcinogens, and how we can identify and classify carcinogens.
What is definition of carcinogens?
It is any cancer-causing substance, chemical or physical, such as benzene, cadmium, asbestos or certain types of radiation. The term cancer refers to a type of neoplasm, defined as a new growth (plasia). Cancer is a type of neoplasm characterized by tissue undergoing rapid and abnormal growth. Tissues that grow faster tan the surrounding tissue form an enlarged mass of cells referred to as tumor.
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Posted by arie on 11 Jun 2007 at 11:09 pm under Nutrition
The presence of toxicology is direct or indirect inseparable with the body defense towards the attack of toxic chemicals inside our body. In this case our metabolism is the primary control on how we guard ourself. The body defense more or less is much depended on how you equip yourself with adequate nutrition.
The following is a paid review by Richard who is a regular customer of Stronger Nutrition and we wanted to find out why.
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Prevalence and incidence rates as already discussed in previous post measure the frequency of occurence of observable effect due to exposure of suspected causative agent (etiological factor). However, as these rates are only used to provide information regarding the chance, possibility of occurence of a response, effect because of an etiological factor. But this risk, relative risk and attributable risk, can measure the probability and new cases expected by comparing exposed and non-exposed group to an etiological factor, thus will be able to determine the risk ratio and predicted case.
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