1. • Often requires large sample sizes.

2. • It is not efficient in rare events or with long latency periods.

3. • Its execution can require a lot of time and money.

4. • It is not useful for rare diseases.

5. • They are expensive studies due to the number of people and the follow-up time required, as well as the efforts that must be carried out so that the quality of the follow-up minimizes losses among the populations being followed, maintaining them at an acceptable level.

As an alternative, there is another type of cohort study: retrospective cohorts, in which the research is carried out after the disease has occurred, for which both the presence of exposure and the outcome must come from highly reliable historical records in which the exposure and outcome have been accurately recorded at the time they occur.

• - The Framingham Heart Study is one of the best-known cohort studies studying cardiovascular risk factors.

• - The United Kingdom Prospective Diabetes Study (UKPDS) is the cohort study on the evolution of type 2 diabetes mellitus.

• - Cohort.

• - The content of this article incorporates material from an entry of the Free Universal Encyclopedia, published in Spanish under the Creative Commons Share-Alike 3.0 license.

1. • Study foreign exposure factors.

2. • Visualize the multiple effects that an exhibition can have.

3. • Simultaneously observe the effects of several exposures (as long as this possibility is raised from the beginning of the study).

4. • Enable the sample of the temporal sequence between exposure and outcome.

5. • Allow the estimation of incidence and relative risk.

6. • Clearly establish the sequence of events of interest such as exposure-disease.

7. • Avoid survivorship bias.

8. • Have better control over the selection of subjects.

9. • Have greater control of the measures.

10. • It is characterized by having movement.

1. • Often requires large sample sizes.

2. • It is not efficient in rare events or with long latency periods.

3. • Its execution can require a lot of time and money.

4. • It is not useful for rare diseases.

5. • They are expensive studies due to the number of people and the follow-up time required, as well as the efforts that must be carried out so that the quality of the follow-up minimizes losses among the populations being followed, maintaining them at an acceptable level.

As an alternative, there is another type of cohort study: retrospective cohorts, in which the research is carried out after the disease has occurred, for which both the presence of exposure and the outcome must come from highly reliable historical records in which the exposure and outcome have been accurately recorded at the time they occur.

• - The Framingham Heart Study is one of the best-known cohort studies studying cardiovascular risk factors.

• - The United Kingdom Prospective Diabetes Study (UKPDS) is the cohort study on the evolution of type 2 diabetes mellitus.

• - Cohort.

• - The content of this article incorporates material from an entry of the Free Universal Encyclopedia, published in Spanish under the Creative Commons Share-Alike 3.0 license.