The health department found an alarming number of individuals with a rare disease. They decide to collaborate with a major hospi
tal in the area to conduct a study to uncover possible past exposures. The hospital plans to match healthy controls to those with the rare disease. This type of study would be classified as: Experimental study Case-control study Cross-sectional study Retrospective cohort
Case control study can be defined as the type of observational study in which outcomes are identified by observing the changes in controlled and experimental samples. The incidences and frequencies of the rare diseases can be recorded and analyzed using hospital health records this will help in analyzing of the effect and emergence of a particular rare disease in the community or the population located or confined to a particular geographical area. This an example of case control study. Here, in the given study the occurrence of rare diseases and their frequency is compared with normal people in the population.
