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EPID 766: Analysis of Longitudinal Data from ... - NCSU Statistics

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CHAPTER 1 Epid <strong>766</strong>, D. Zhang<br />

1.3 <strong>Data</strong> examples<br />

Example 1: Framingham study<br />

In the Framingham study, each <strong>of</strong> 2634 participants was examined every<br />

2 years for a 10 year period for his/her cholesterol level.<br />

Study objectives:<br />

1. How does cholesterol level change over time on average as people<br />

get older?<br />

2. How is the change <strong>of</strong> cholesterol level associated with sex and<br />

baseline age?<br />

3. Do males have more stable (true) baseline cholesterol level and<br />

change rate than females?<br />

A subset <strong>of</strong> 200 subjects’ data is used for illustrative purpose.<br />

Graduate Summer Session in Epidemiology Slide 12

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