Ch 5 Flashcards
Evidence-based practice (EBP)
An evidence-based, patient-centered clinical practice approach integrating best evidence, clinician expertise, patient preferences, and resource considerations for effective problem-solving.
Steps of Evidence-Based Practice
There are seven steps, numbered from 0 to 6
- Cultivate a spirit of inquiry within an EBP culture and environment.
- Ask a clinical question in PICOT format.
- Search for the most relevant and best evidence.
- Critically appraise the evidence you gather.
- Integrate the best evidence with your clinical expertise and patient preferences and values to make the best clinical decision.
- Evaluate the outcomes of practice changes based on evidence.
- Communicate the outcomes of EBP decision or changes.
Developing a PICOT Question
P - Patient population of interest
Identify patients by age, gender, ethnicity, and disease or health problem.
I - Intervention or area of interest
Which intervention is worthwhile to use in practice (e.g., a treatment, diagnostic test, prognostic factor)? What area of interest influences a desired
outcome (e.g., complementary therapy, motivational interviewing)? C - Comparison intervention or area of interest
What is the usual standard of care or current intervention used now in practice?
O - Outcome
What result do you wish to achieve or observe as a result of an intervention (e.g., change in patient behavior, physical finding, or patient perception)?
Make an outcome statement nondirectional. For example: “Does use of chlorhexidine affect incidence of CLABSI?” instead of “Does the use of chlorhexidine reduce incidence of CLABSI?” A directional outcome may limit the articles in your search.
T - Time
What amount of time is needed for an intervention to achieve an outcome
(e.g., the amount of time needed to change quality of life or patient behavior)?
Peer-reviewed
reviewed for accuracy, validity, and rigor and approved for publication by experts before it is published.
Levels of evidence
Figure 5.2
hypotheses
predictions made about the relationship or differences among study
variables
variables (concepts, characteristics, or traits that vary within or among subjects
Scientific method
foundation of all research, an objective methodology for scientific investigation that results in unbiased inter- pretations of the phenomenon under study and refinement of knowl- edge. It is a process that, when done formally and rigorously, yields new knowledge critical to a science, be it nursing, psychology, or medicine. The scientific method is a systematic, step-by-step process.
Research using the scientific method includes the following steps:
- Make an observation. The researcher identifies a problem area or area of interest to study.
- Ask questions about the observation and gather information. The re- searcher conducts a thorough literature review of the area of interest.
- Analyzetheliteratureandformaresearchquestionorhypothesis—a proposed explanation for a phenomenon that can be tested, often
involving a prediction based on that question or hypothesis. - Conductastudyusingscientificrigor.Testthequestionorthehypoth- esis and prediction in an experiment (quantitative or qualitative) that can be reproduced. The type of study is driven by the research ques- tion. For example, “Does the use of chlorhexidine reduce incidence of CLABSI?” is a quantitative study involving statistical analysis. “What are nurses’ perceptions of their own grieving when caring for COVID-19 patients?” is a research question best studied qualitatively. Researchers gather empirical data through the use of observations and assessments (e.g., surveys, physiological data, observation) and
use the data to discover new knowledge. - Analyzethedataanddrawconclusions.Acceptorrejectthequestion/
hypothesis or modify the hypothesis if necessary.
TABLE 5.2
Comparison of Steps of the Nursing Process With the Scientific Method Process
Quantitative Research
-relies on methods that precisely measure and quantify a study’s variables.
-Quantitative research is the precise, systematic, objective examination of specific concepts. It focuses on numerical data, statistical analysis, and controls to elimi- nate bias in findings
-Two examples of quantitative research are (1) a study dealing with a new pain therapy that quantitatively measures participants’ self-reported pain severity and (2) a study testing different forms of surgical dress- ings to measure the extent of wound healing.
- There are many quantitative methods. Some of the more commonly used quan- titative methods include experimental, nonexperimental, survey, and evaluation research.
Experimental Research
Experimental study
-tightly controls conditions to eliminate bias with the goal of generalizing the results of the study to similar groups of subjects.
- Researchers test an intervention (e.g., a new drug, therapy, or educational method) against the usual standard of care.
-They randomly assign similar sub- jects to either a control or a treatment group. When an RCT is completed, the researcher hopes to know whether the intervention leads to better outcomes than the standard of care.
Types of Research
• Exploratory research: Initial nonexperimental study designed to develop or refine the dimensions of phenomena (facts or events) or to develop or refine a hypothesis about the relationships among phenomena. Example: Pilot study testing the benefits of a new exercise program for older adults with dementia.
• Evaluation research: A form of quantitative research. Study that tests how well a program, practice, or policy is working. When programs are unsuccessful, evaluation research identifies problems with the program and opportunities for change or barriers to program implementation. Example: Study measuring the outcomes of an informational campaign designed to improve parents’ ability to follow immunization schedules for their children.
• Descriptive research: Study that measures characteristics of people, situations, or groups and the frequency with which certain events or char- acteristics occur. Example: Study to examine RNs’ biases toward caring for obese patients.
• Historical research: Descriptive research designed to establish facts and relationships concerning past events. Example: Study examining the societal factors that led to the acceptance of advanced practice nurses by patients.
• Experimental research: Study in which the investigator controls the study variable and randomly assigns subjects to different conditions to test the variable. Example: RCT comparing chlorhexidine with povidone-iodine in reducing the incidence of IV-site phlebitis.
• Correlational research: Nonexperimental study that explores the interrelationships among variables of interest without any active intervention by the researcher. Example: Study examining the relationship between RNs’ educational levels and their satisfaction in the nursing role.
sampling error
sample does not represent entire population under study
Qualitative nursing research
-studies phenomena that are difficult to quantify or categorize, such as patients’ perceptions of illness or quality of life.
-This research method describes information obtained in a nonnumeric form.
-Data are typically gathered during interviews via recording of each subject.