The nurse participates in data collection in a study comparing the effect of two antilipidemia medications on total cholesterol in patients with hyperlipidemia.Which are extraneous variables to consider in such a study? Select all that apply.
A) Differences between the antilipidemia medications
B) Family history of hyperlipidemia
C) Individual patients' weights
D) Other serum lipid values

Question

Quizplus · Accepted Answer

Extraneous variables exist in all studies and can interfere with obtaining a clear understanding of the relationships among the study variables.One variable that can affect the study outcome is family history of hyperlipidemia in study participants.Patients who are obese may have different outcomes related to this variable than the reactions of those who are not obese.Other serum lipid values,such as high-density lipoproteins or low-density lipoproteins,can affect total cholesterol.The differences between the two medications are controlled in this study and are not extraneous variables.

The Nurse Participates in Data Collection in a Study Comparing