Identify the independent and dependent variables and the level of measurement from this scenario: People with central line access in the ICU will have increased infection risk over... Identify the independent and dependent variables and the level of measurement from this scenario: People with central line access in the ICU will have increased infection risk over people without central lines in the ICU.
Understand the Problem
The question is asking for the identification of independent and dependent variables in a given scenario, as well as their levels of measurement. The independent variable is 'central line access' (presence or absence), and the dependent variable is 'infection risk'. The level of measurement for 'central line access' is nominal, while for 'infection risk', it could be measured at an ordinal or ratio level depending on how it is quantified.
Answer
Independent variable: central line access. Dependent variable: infection risk. Levels of measurement: central line access (nominal), infection risk (ratio).
The final answer is: The independent variable is central line access, the dependent variable is infection risk, and the levels of measurement are nominal for central line access and ratio for infection risk.
Answer for screen readers
The final answer is: The independent variable is central line access, the dependent variable is infection risk, and the levels of measurement are nominal for central line access and ratio for infection risk.
More Information
Central line access in patients is a categorical variable classified as either 'yes' or 'no,' making it nominal. Infection risk is a measurable outcome that can vary in degree or frequency, making it a ratio variable in this context.
Tips
A common mistake is confusing the dependent and independent variables. Remember, the independent variable is what you change (central line access), and the dependent variable is what you measure (infection risk).
Sources
- Central Line–Associated Blood Stream Infections - StatPearls - NCBI - ncbi.nlm.nih.gov
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