Quantitative Research Report On Dietary Vitamin K Guidance Essay

Quantitative Research Report On Dietary Vitamin K Guidance Essay

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Quantitative Research Report Critical Appraisal-Dietary Vitamin K Guidance
Researchers use quantitative research approach when they are interested in learning the relationships among variables. A variable is something that is various, including blood pressure, weights, and pain levels. It can be categorized in a different level of measurement: nominal, ordinal, interval, and ratio measurement (Polit & Beck, 2012). Depending on the numbers of variables and groups in a study, researchers can choose a corresponding research design and statistical tests. Experimental, also called a randomized controlled trial, and non-experimental (observation) are two main research designs for a quantitative research study. In a medical field, experimental research design is also called clinical trial (Polit & Beck, 2012).
Furthermore, statistical tests include, but not limited to, chi Square (X2), paired t-test, ANOVA, and Perason’s r. Perason’s r is used when researchers are interested in correlational analyses (Polit & Beck, 2012). The level of significance is determined based on a p value. The p value is obtained by running power analyses. When the p value is less than 0.05, it shows the statistical significance, which means the study is meaningful. If the p value is higher than 0.05, the study has a higher chance to be wrong. There is always the possibility of being wrong in a study.
The research study, Dietary Vitamin K Guidance: an Effective Strategy for Stable Control of Oral Anticoagulation, will be critiqued in the report. This is a quantitative research study focusing on the relationships between dietary vitamin K and stability of warfarin therapy use. When critiquing a quantitative research study, important elements that affect the q...


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...relationships between dietary vitamin K and warfarin therapy.
Conceptual/Theoretical Framework.
The researcher implied a conceptual rationale for this study based on her interests and clinical observation. She stated in the beginning of this study, “Numerous risk factors for instability of oral anticoagulation have been identified, including variability in vitamin K intake. However, few studies have directly tested the feasibility of manipulating dietary vitamin K to achieve stable oral anticoagulation” (Booth, 2010, p. 178). According to the text book, in most nursing studies, the framework is not an explicit theory or conceptual model; instead, a conceptual rationale are used based on a researcher’s interests or observable phenomena, but it is not explained (Polit & Beck, 2012). Given the statement of problem, the conceptual rationale was appropriate for the study.

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