In a Study Comparing Two Nonequivalent Groups, a Selection by History

question 12

Multiple Choice

In a study comparing two nonequivalent groups, a selection by history confound occurs when

• A)some event intervenes between pretest and posttest and affects just one of the groups
• B)some event intervenes between pretest and posttest and affects both selected groups equally
• C)selection influences one of the groups and history influences the other
• D)some historical event causes a failure of the random assignment procedure

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Definitions:

I50.1

Refers to a code in the ICD-10 classification for Left ventricular failure, a specific type of heart failure where the heart's left ventricle is unable to pump blood effectively.

Angina

Chest pain or discomfort that occurs when an area of your heart muscle doesn't get enough oxygenated blood, often a symptom of coronary artery disease.

Hypertension

High blood pressure, a chronic medical condition where the blood pressure in the arteries is elevated, requiring the heart to work harder than normal.

Sedentary Lifestyle

A way of life that involves little to no physical activity, often associated with negative health consequences.