What is the dependent variable in this statement of the purpose of a research study? "To examine barriers and aids to maintaining the nutritional health of community-dwelling elderly residents based on their perspectives.".
Elderly residents.
Barriers and aids to maintaining nutritional health.
Those who live in community-dwellings.
Nutritional health.
The Correct Answer is D
In the statement, the purpose of the research study is to examine barriers and aids to maintaining the nutritional health of community-dwelling elderly residents. "Nutritional health" is the concept or outcome that the study aims to understand or explore, making it the dependent variable. The study seeks to explore how various factors (barriers and aids) influence or affect nutritional health in elderly residents.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice B rationale:
Evidence-based practice. Rationale: The unit's client care requirements are evidence-based practice because they are based on the findings of several multi-institutional studies that demonstrated a statistically significant decrease in IV-related septicemia rates when both alcohol and iodine were used as cleansers. Evidence-based practice involves integrating the best available evidence from research into clinical decision-making and care protocols.
Choice A rationale:
Outcome-oriented process is not the most accurate description. While the process aims to achieve specific outcomes (reduction in IV-related septicemia rates), the emphasis is on using evidence-based practices to achieve those outcomes.
Choice C rationale:
Theory-based practice is not the primary focus. The unit's practice is primarily driven by empirical evidence from research studies rather than a specific theoretical framework.
Choice D rationale:
Standards-related process is not the primary description. While the practice aligns with standards of care, the key aspect is its evidence-based nature, which goes beyond adherence to standards.
Correct Answer is A
Explanation
Choice A rationale:
A meta-analysis that concluded that bone density improved among individuals who took Vitamin D. Rationale: A meta-analysis provides the highest level of evidence among the options listed. It synthesizes data from multiple studies, often randomized controlled trials (RCTs), to draw conclusions about the effectiveness of an intervention. In this case, the meta-analysis concluded that bone density improved among individuals who took Vitamin D, suggesting strong evidence to support its use.
Choice B rationale:
A cross-sectional study that found a strong relationship between Vitamin D intake and bone density. Rationale: Cross-sectional studies can identify associations between variables but cannot establish causality. While this study found a strong relationship, it does not provide as strong evidence as a meta-analysis of RCTs.
Choice C rationale:
A cohort study that concluded low levels of Vitamin D were linked to decreased bone mineral density. Rationale: Cohort studies can provide valuable evidence, but they may have limitations, such as confounding variables. While this study suggested a link, it may not be as robust as a meta-analysis of RCTs.
Choice D rationale:
A time series design study that reported that those who took Vitamin D had improved bone density. Rationale: Time series designs can be useful for assessing changes over time, but they may have limitations in terms of establishing causality. Additionally, the strength of evidence from a single time series study may not be as high as that from a meta-analysis of multiple RCTs.
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