observational study in a sentence

Examples

1. Unfortunately, for observational studies, the assignment of treatments to research subjects is typically not random.
2. These results were in both experimental and observational studies.
3. RCT are how one determines effectiveness of treatment this cannot be determined in a observational study.
4. Observational studies have two components, descriptive and analytical.
5. And controlled experiments often prove observational studies wrong.
6. More data is needed to support the conclusions of observational studies which suffer from design flaws.
7. Scientists conduct observational studies while learning about the daily lives of people in an African country.
8. The chemostat and observational studies suggest many nuances to CRISPR and phage ( co ) evolution.
9. Many physicians were recommending hormone replacement therapy for cardiac protection based on the previous observational studies.
10. The report concludes for the need for strengthening the reporting of observational studies in clinical anatomy.