Chapter 1. Measuring disease occurrence

In this chapter, we'll cover the basics such as calculating incidence rates, prevalence, and mortality. We'll also explain the concept of age confounding and teach you what to do about it.
6 Steps

Chapter 2. Assessing the validity of diagnostic tests

Never blindly trust the findings of a diagnostic test—know what the results really mean and how reliable they are. This chapter will bring you up to speed on sensitivity, specificity, and predictive values.
6 Steps

Chapter 3. Expressing disease prognosis

Does an improvement in screening improve disease prognosis? This chapter will give you the answer. Learn how to interpret life tables, 5-year survival rates, and Kaplan-Meier curves.
7 Steps

Chapter 4. Interpreting randomized trials

Randomized trials are the Holy Grail of clinical studies; it's necessary to understand them and interpret them correctly. In this chapter, we'll teach you how to read them with expertise.
6 Steps

Chapter 5. Interpreting cohort and case-control studies

Cohort and case-control studies are observational studies used to assess the association between disease and exposure: learn how these studies are designed and when to use them.
6 Steps

Chapter 6. Measuring association

The association between a risk factor and disease is often expressed as the relative risk or the odds ratio. Learn how to calculate, interpret, and compare these two common measures.
5 Steps