Clinical Study Design

Hi ! For today I'll post academic's things k. I just want to share to you my notes with you guys. Alhamdulillah I managed to get an A that day but this only apart of my notes k - 

Clinical Study Design.

This is the additional note. i love to write repeatedly :D

Cross-sectional studies describe the relationship between diseases and other factors at one point in time in a defined population. Cross sectional studies lack any information on timing of exposure and outcome relationships and include only prevalent cases.  They are often used for comparing diagnostic tests. 

Case control studies are studies in which patients who already have a specific condition are compared with people who do not have the condition. The researcher looks back to identify factors or exposures that might be associated with the illness.  They often rely on medical records and patient recall for data collection. These types of studies are often less reliable than randomized controlled trials and cohort studies because showing a statistical relationship does not mean than one factor necessarily caused the other.

Cohort studies identify a group of patients who are already taking a particular treatment or have an exposure, follow them forward over time, and then compare their outcomes with a similar group that has not been affected by the treatment or exposure being studied. Cohort studies are observational and not as reliable as randomized controlled studies, since the two groups may differ in ways other than in the variable under study. 

Any question regarding these notes feel free to ask me. Hahah. InshaAllah I'll try my best to help you guys!