What are the disadvantages of a case-control study?
The most commonly cited disadvantage in case-control studies is the potential for recall bias. Recall bias in a case-control study is the increased likelihood that those with the outcome will recall and report exposures compared to those without the outcome.
What are some advantages and disadvantages of a case-control study?
Advantages and Disadvantages of Case-Control Studies
- They are efficient for rare diseases or diseases with a long latency period between exposure and disease manifestation.
- They are less costly and less time-consuming; they are advantageous when exposure data is expensive or hard to obtain.
What are three disadvantages of case studies?
List of the Disadvantages of the Case Study Method
- It can have influence factors within the data. Every person has their own unconscious bias.
- It takes longer to analyze the data.
- It can be an inefficient process.
- It requires a small sample size to be effective.
- It is a labor-intensive method of data collection.
How do you choose controls for a case-control study?
Selection of the Controls
- The comparison group (“controls”) should be representative of the source population that produced the cases.
- The “controls” must be sampled in a way that is independent of the exposure, meaning that their selection should not be more (or less) likely if they have the exposure of interest.
What are the advantages and disadvantages of case-control vs cohort studies?
Advantages and disadvantages of cohort and case control studies
| Cohort studies | Case control studies | |
|---|---|---|
| Sample size | Large | Small |
| Cost | Elevated except if retrospective cohorts | Smaller |
| Time required | Long, sometimes very long except if retrospective cohorts | Shorter |
| Follow up | Difficult, loss to follow up | No follow up |
What is the main purpose of selecting controls in a case-control study?
The purpose of the control group is to determine the relative size of the exposed and unexposed components of the source population.
Which of the following are disadvantages of cohort studies?
Disadvantages of Prospective Cohort Studies
- You may have to follow large numbers of subjects for a long time.
- They can be very expensive and time consuming.
- They are not good for rare diseases.
- They are not good for diseases with a long latency.
- Differential loss to follow up can introduce bias.
What are the disadvantages of cohort study?
What are the advantages of a case-control study?
Epidemiology: Advantages and Disadvantages of Case Control Studies
- Easy to conduct as no follow up is required.
- No attrition, as no follow up is needed.
- Gives faster results.
- Inexpensive.
- Suitable for rare and newly identified diseases.
- More than one risk factors can be studied simultaneously.
What principles should we follow when selecting controls?
They proposed and summarized four basic principles: study base, deconfounding, comparable accuracy and efficiency.