Sample interview questions: How do you ensure the accuracy and validity of data collected in epidemiological studies?
Sample answer:
Accuracy and Validity of Data in Epidemiological Studies
- Rigorous study design: Adherence to established protocols, random sampling, and appropriate sample size calculation to minimize bias.
- Standardized data collection: Use of validated questionnaires, checklists, and measurement tools to ensure consistency and reliability in data collection.
- Training and supervision of data collectors: Thorough training and ongoing supervision to maintain data quality standards and reduce observer error.
- Data entry and validation: Multiple data entry with independent verification, use of data management software with built-in error checks, and logical consistency checks to identify and correct errors.
- Randomization and blinding: In clinical trials, randomization of subjects and blinding of investigators to treatment allocation to minimize selection bias and performance bias.
- Control for confounding variables: Statistical adjustment or stratification to account… Read full answer