Epidemiologist determines factors that associate with health and effect, comparing groups of people who are similar. Through the collection and analysis of statistical information they are able to create conclusions. Though exposing a link between health and cause may assist in determining the outcomes and prevention, does not necessarily mean that the specific cause is the problem. There are endless possible causes for a disease, as well as factors that contribute such as age, sex, ethnic group and occupation. In epidemiological studies, it is difficult to establish the cause and effect without extensive research, inference and proof.
Due to the difficulty in determining causes, Epidemiologist must follow criteria that can determine the strength of the association between cause and effect. This includes:
Cigarette Smoking: Case Study
Lung Cancer: Case Study
Lung Cancer causes approximately 1, 370,000 deaths worldwide every year. Lung Cancer is the occurrence of a lung cell gene mutation, which makes the cell unable to correct DNA damage or delete itself. The abnormal cells continue to grow within the lungs, (unable to develop into healthy lung tissue) and divide to forum tumours. These tumours grow and interfere with the lung’s ability to provide the bloodstream with oxygen. There are two types of cancer; Primary Lung Cancer (which originates in the lungs) and Secondary Lung Cancer (which originates elsewhere, metastasizes and reaches the lungs). Lung Cancer is seen as the number 1