Approximately 1000 college students were asked to keep a record of what supplemental vitamins they took and how many colds they had over the course of a year.The amount of vitamin C consumed was compared with the students' incidences of colds.This is an example of a(an):

Question

Quizplus · Accepted Answer

This study involves observing and analyzing the relationship between vitamin C consumption and cold incidence in a large population (college students), which is the definition of an epidemiological study. It is not a clinical trial because there is no experimental manipulation of a treatment or intervention. It is not an intervention study because there is no deliberate intervention or treatment being administered to participants. It is also not a laboratory study because it does not involve conducting experiments on animal or cell cultures in a controlled laboratory setting.

Approximately 1000 College Students Were Asked to Keep a Record