A research study is planned to determine the effect of nutritional supplementation and type of support surface on the rate of wound healing in sacral myocutaneous flap failures. Which is an independent variable in this study? (Select all that apply.)
a. Rate of wound healing
b. Sacral myocutaneous flap
c. Retailer source of protein supplement
d. Type of support surface
e. Nutritional supplementation
ANS: D, E
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Correct The type of support surface is one of the specified interventions or treatments (independent variables).
Nutritional supplementation is one of the specified interventions or treatments (independent variables).
Incorrect Rate of wound healing is the dependent variable.
Sacral myocutaneous flap failure is the type of wound being studied.
The retailer of the protein supplement is not an independent variable in this study. It would be an independent variable if two different retailers' supplements were being compared.
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