An investigator is interested in the etiology of neonatal jaundice. to study this condition, he selected 100 children who were diagnosed with this condition and 100 children born in the same time period and in the same hospital who did not have a diagnosis of neonatal jaundice. he then reviewed the obstetrical and delivery records of their mothers to determine various prenatal and perinatal exposures. this is an example of a(n)

Case control.

Explanation:

Case control may be defined as a a type of the epidemiological observational type of study in which the subjects are not random. The exposure status cannot be examined by the researcher.

Two groups are used in these studies - exposed and unexposed group. Here, both the affected and unaffected children are available. One group can be considered as case or exposed group while the other group can be considered as unexposed or control group.

Thus, the answer is case control.

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