Question: Part 1 (choose 1 topic only, 250 words)

You are expected to write a 250 word essay on any of the topics below as relates to epidemiology.

What are "secular trends" and "cohort effects" in epidemiology? What is the essential difference between the two? Your response must be at least 250 words in length.

What are "temporal clustering" and "spatial clustering" in descriptive epidemiology? What is the significance of each type of clustering? Your response must be at least 250 words in length.

Explain the term "population at risk" and provide at least two relevant examples as seen in the practice of modern epidemiology. Your response must be at least 250 words in length.

Differentiate among ratios, proportions, and rates as used in epidemiology today. Define each of these measurements, and briefly describe its importance in community health. Your response must be at least 250 words in length

Part 2: After writing about the topic do the following (2 pages ):

Once you have chosen your topic, you will need to submit an outline of your preliminary research with at least two scholarly references. Within your outline, discuss why you chose your topic, possible subtopics for focus (at least two), possible research questions you could investigate, and the relevance of your two scholarly references to your research.