1. Know and interpret and compute the main frequency measures used in research: reason, proportion and rate. Prevalence and incidence.
2. Know and interpret and calculate the principal measures of association used in observational cohort studies.
3. Know and interpret and calculate the principal measures of association used in observational studies of cases controls.
4. Know and interpret and calculate the principal measures of potential impact employed in experimental studies.
Describe the principal measures of frequency used to describe the extent of a health problem. Also describes the key measures used to assess the degree of association between a risk factor and a disease (relative risk and odds ratio). It also describes how to measure the efficacy and safety of interventions. Therapeutic in experimental studies through the use of measures such as reducing absolute and relative risk and the calculation of the number of patients to be treated to prevent an event or result in damage. Finally it enters the importance of the difference between data obtained in the sample and the reference population and the way of a correct interpretation through the confidence intervals.