# Assignment 2: prevalence and incidence calculation measures

Read the scenario below and complete the questions that follow.

A cohort study is conducted to assess the association between clinical characteristics of hypertension and the risk of stroke. The study involves 1,250 (n) participants who are free of stroke at the start of the study. Each participant is assessed at the study start (baseline) and every year thereafter for five years. The data on hypertension status measured at baseline and at two years is as follows:

2 Years: Not hypertensive2 Years: HypertensiveBaseline: Not hypertensive850148Baseline: Hypertensive45207

• Compute the prevalence of hypertension at baseline.
• Compute the prevalence of hypertension at two years.
• Compute the incidence of hypertension over two years.

The data on hypertension status measured at baseline and five years is as follows:

Free of Stroke at 5 YearsStrokeBaseline: Not hypertensive95246Baseline: Hypertensive23418

Complete the following:

• Compute the cumulative incidence of stroke in the study.
• Compute the cumulative incidence of stroke in patients classified as hypertensive at baseline.
• Compute the cumulative incidence of stroke in patients free of hypertension at baseline.
• Compute the risk difference of stroke for patients with hypertension as compared to patients free of hypertension.
• Compute the relative risk of stroke for patients with hypertension as compared to patients free of hypertension.
• Compute the population-attributable risk of stroke due to hypertension.

In your answers, show the formulae you use and the steps of the calculation.

Analyze the measures you calculate to draw conclusions.

Present the calculations and answers in an Excel spreadsheet and Word document. Write the interpretation of results in a Word document. Apply APA standards to citation of sources. Use the following file naming convention: LastnameFirstInitial_M4_A2.xlsx and LastnameFirstInitial_M4_A2.docx

By Week 4, Day 7, deliver your assignment to the M4: Assignment 2 Dropbox.

Calculate all computations for the two-year interval and the five-year interval.

Correctly calculated all the required measures showing the formulae and the steps of the calculations in an Excel spreadsheet.40

Analyze the measures you calculate to draw conclusions.

Conclusions drawn are valid and accurately reflect the calculations completed.40

Write in a clear, concise, and organized manner; demonstrate ethical scholarship in accurate representation and attribution of sources (i.e., APA); and display accurate spelling, grammar, and punctuation.

Wrote in a clear, concise, and organized manner; demonstrated ethical scholarship in appropriate and accurate representation and attribution of sources; and displayed accurate spelling, grammar, and punctuation. Use of scholarly sources aligns with specified assignment requirements.20Total:100

Pages (550 words)
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