Use the following information for questions:
In a report by CNN Health News, the headlines read "Study: Junk food raises teens' risk of heart disease." The headlines were based on a study of 249 high school students between the ages of 13 and 18. One researcher said, "more than 80% of those tested were eating a diet that could promote heart disease." Ultrasound was used to measure the thickness of the carotid artery, which, the researcher said, "can be an early indicator of atherosclerosis, an abnormal hardening of the artery walls."
-What type of study was this?
A) A randomized study
B) A case-control study
C) An observational study
D) A matched-pairs designed study

Question

Use the following information for questions:
 In a report by CNN Health News, the headlines read "Study: Junk food raises teens' risk of heart disease." The headlines were based on a study of 249 high school students between the ages of 13 and 18. One researcher said, "more than 80% of those tested were eating a diet that could promote heart disease." Ultrasound was used to measure the thickness of the carotid artery, which, the researcher said, "can be an early indicator of atherosclerosis, an abnormal hardening of the artery walls."
-What type of study was this?
A) A randomized study
B) A case-control study
C) An observational study
D) A matched-pairs designed study

Quizplus · Accepted Answer

This was an observational study because it involved monitoring and recording the behaviors and outcomes of the participants (high school students) without manipulating any variables or assigning specific treatments.

Use the Following Information for Questions