What is epidemiological exposure?

What is epidemiological exposure?

In epidemiology, the term “exposure” can be broadly applied to any factor that may be associated with an outcome of interest. When using observational data sources, researchers often rely on readily available (existing) data elements to identify whether individuals have been exposed to a factor of interest.

What is cohort study in epidemiology?

A cohort study is similar in concept to the experimental study. In a cohort study the epidemiologist records whether each study participant is exposed or not, and then tracks the participants to see if they develop the disease of interest.

What are the four methods of epidemiology?

Epidemiological studies generally fall into four broad categories:

• cross-sectional studies.
• case-control studies.
• cohort studies.
• intervention studies.

What are examples of exposure?

When someone introduces you to theatre, this is an example of a situation where you receive exposure to theatre. When you are outside for too long in the winter and get sick, this is an example of exposure. The condition of being exposed, especially to severe weather or other forces of nature.

What are the 3 main elements of descriptive epidemiology?

In descriptive epidemiology, we organize and summarize data according to time, place, and person. These three characteristics are sometimes called the epidemiologic variables.

What is the weakest study design?

As the exposure status/outcome of interest information is collected in a single moment in time, often by surveys, cross-sectional study design cannot provide a cause-effect relationship and is the weakest of the observational designs.

What type of research is epidemiological?

Epidemiology is the study of how often diseases occur in different groups of people and why. Epidemiological information is used to plan and evaluate strategies to prevent illness and as a guide to the management of patients in whom disease has already developed.

How are cases organized in descriptive epidemiology?

Commonly in descriptive epidemiology, you organize cases by frequency of clinical findings ( Table 6.2) (3). If the disease cause is unknown, this arrangement can assist the epidemiologist in developing hypotheses regarding possible exposures.

How are disease rates determined by the epidemiologist?

In most descriptive analyses, the epidemiologist will determine disease rates by age. This can be as simple as finding that a health event is affecting only a limited age group or as complicated as comparing age-specific rates among multiple groups. Age represents three different categories of determinants of disease risk .

Do you need more precision for epidemiologic data?

More precision is usually not needed for epidemiologic purposes. Effective figures refers to numbers that contain additional, leading non-zero digits that do not vary (e.g., 123, 145, 168, or 177) or vary slightly (see BMI columns in Table 6.3) within a column or row.

How to describe epidemiologic data for Epidemic Intelligence?

For example, initial respiratory symptoms might indicate exposure through the upper airways, as in Table 6.2. A title that includes the what, where, and when that identifies the data it introduces. A data space where the data are organized and displayed to indicate patterns.