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Welcome to Module 4.

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This module will follow the same format

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as the previous two and that will review

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some topics from Epi 1 and
then take a deeper dive.

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This module focuses on
measures of association,

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things like risk ratio, attributable risk,

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and odds ratios.

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We'll review when it is appropriate

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to use each type of measure.

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And then we'll look more deeply

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into the mathematical development

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and relationship between the measures,

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particularly the relationship
between risk and odds.

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This will be important as we move forward.

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If these measures have been
tricky for you in the past

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or if you're just feeling
like it's been a while

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since you've thought about them,

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I'd encourage you to start

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by going back to your
Epi 1 textbook and notes

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before you dive into this week's content.

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Reach out with questions.