Theory, Research, and Evidence-Based Practice

Nursing Social Policy Statement: Issues Addressed by Nurses

Nurses play a vital role in promoting health and wellness, ensuring safety, and providing quality care. Their responsibilities extend beyond physical care to include emotional, spiritual, and social aspects of health.

• Promotion of Health and Wellness: Nurses encourage healthy behaviors and support patients in achieving optimal well-being.

• Safety and Quality of Care: Ensuring that care is safe, effective, and patient-centered.

• Care Coordination: Managing and integrating care processes, including self-care and support for families.

• Comfort and Pain Management: Addressing physical, emotional, and spiritual comfort and discomfort.

• Adaptation: Helping patients adjust to physiological and pathophysiological changes.

• Emotional Support: Supporting patients through life events such as birth, illness, and death.

• Cultural Sensitivity and Health Literacy: Communicating effectively across languages and cultures, and promoting understanding of health information.

• Decision Making: Supporting patient autonomy and informed choices.

• Social Policy and Health Systems: Understanding how policies and systems affect access, cost, and quality of care.

• Disease and Injury Prevention: Promoting environmental and behavioral strategies to prevent illness and injury.

Sources of Knowledge in Nursing

Nursing knowledge is derived from multiple sources, each with strengths and limitations.

• Traditional Knowledge: Passed down through generations; practical but often subjective.

• Authoritative Knowledge: Based on the expertise of recognized authorities; accepted as truth but may lack scientific validation.

• Scientific Knowledge: Obtained through systematic research and the scientific method; objective and verifiable.

Example: Traditional knowledge might include home remedies, while scientific knowledge is based on clinical trials.

Historical Influences on Nursing Knowledge

The development of nursing knowledge has been shaped by historical figures and societal changes.

• Florence Nightingale: Emphasized efficient, knowledgeable care and distinguished nursing from medicine.

• Societal Influences: The evolution of nursing education, women entering the workforce, and the shift toward scientific approaches in nursing.

Framework of Nursing Theory

Theories in nursing provide a structured way to understand and guide practice.

• Theory: A group of concepts describing a pattern of reality; can be tested and used to guide research.

• Concepts: Abstract ideas representing objects, properties, or events and their relationships.

• Conceptual Framework/Model: An organized set of concepts forming a coherent structure.

• Methods of Theory Development:

  • Deductive Reasoning: Moving from general principles to specific cases.

  • Inductive Reasoning: Building generalizations from specific observations.

Example: Using a general theory about patient adaptation to predict how a specific patient will respond to illness (deductive reasoning).

Types of Reasoning

• Deductive Reasoning: Starts with a general idea and applies it to specific situations.

• Inductive Reasoning: Observes specific cases to develop broader generalizations.

Interdisciplinary Base for Nursing Theories

Nursing theories draw from various disciplines to explain health and human behavior.

• General Systems Theory: Examines how parts of a system interact to form a whole.

• Adaptation Theory: Focuses on how living things adjust to changes in their environment.

• Developmental Theory: Describes predictable patterns of growth and development throughout life.

Goals of Theoretical Frameworks in Nursing

• Provide holistic patient care

• Deliver individualized care tailored to patient needs

• Promote health and prevent or treat illness

Common Concepts in Nursing Theories

• The Person (Patient): Central focus of nursing care

• The Environment: All external factors affecting the person

• Health: The level of wellness or well-being

• Nursing: The actions and characteristics of the nurse

Research in Nursing

Research is essential for advancing nursing knowledge and improving patient care.

• Scientific Inquiry: Systematic process of collecting and analyzing data to describe, explain, or predict events.

• Goals of Research: Develop theories, solve problems, and improve clinical practice.

• Areas of Nursing Research: Clinical care, education, policy, ethics, history, and professional development.

Methods of Nursing Research

• Quantitative Research: Uses numerical data to test hypotheses and measure variables.

  • Basic Research: Generates and refines theory; not always directly applicable.

  • Applied Research: Directly influences clinical practice.

• Qualitative Research: Explores meanings and experiences; reality is seen as subjective and variable.

Key Terms in Quantitative Research

• Variable: Any characteristic that can vary or be measured.

• Dependent Variable: The outcome being measured.

• Independent Variable: The factor being manipulated or studied for its effect.

• Hypothesis: A testable prediction about the relationship between variables.

• Data: Collected information used for analysis.

• Instruments: Tools used to collect data (e.g., surveys, tests).

Types of Quantitative Research

• Descriptive: Describes characteristics of a population or phenomenon.

• Correlational: Examines relationships between variables.

• Quasi-experimental: Tests interventions without full randomization.

• Experimental: Tests interventions with random assignment and control groups.

Steps of Quantitative Research

1. State the research problem

2. Define the purpose of the study

3. Review related literature

4. Formulate hypotheses and variables

5. Select research design

6. Select population and sample

7. Collect data

8. Analyze data

9. Communicate findings and conclusions

Qualitative Research Methods

• Phenomenology: Explores lived experiences to understand the essence of a phenomenon.

• Grounded Theory: Develops theories based on data from social processes.

• Ethnography: Studies cultures and communities through observation and participation.

• Historical: Examines past events to inform current practice.

Ethics in Clinical Research

Ethical considerations are fundamental to conducting research involving human subjects.

• Value: Research should have social or scientific value.

• Scientific Validity: Studies must be methodologically sound.

• Fair Subject Selection: Participants should be chosen equitably.

• Favorable Risk–Benefit Ratio: Benefits should outweigh risks.

• Independent Review: External evaluation of study protocols.

• Informed Consent: Participants must be fully informed and voluntarily consent.

• Respect for Subjects: Ongoing respect and protection for participants.

Evidence-Based Practice (EBP)

EBP integrates the best available research evidence with clinical expertise and patient values to achieve optimal health outcomes.

• Definition: A problem-solving approach to clinical decision-making using current best evidence.

• Components: Research evidence, clinical expertise, and patient preferences.

• Mandate: Requires systematic review and analysis of research findings.

Steps in Implementing EBP

1. Formulate clinical questions

2. Search for and collect the best evidence

3. Critically appraise the evidence (validity, reliability, applicability)

4. Integrate evidence with clinical expertise and patient/family preferences

5. Evaluate outcomes of the practice decision or change

6. Disseminate outcomes of the EBP decision or change

Asking Clinical Questions: PICOT Format

• P: Patient, population, or problem of interest

• I: Intervention of interest

• C: Comparison of interest

• O: Outcome of interest

• T: Time

Example: In adults with hypertension (P), does daily exercise (I) compared to no exercise (C) reduce blood pressure (O) over six months (T)?

Reading and Critiquing Research Articles

• Review article elements (introduction, methods, results, discussion)

• Determine the level and quality of evidence

• Assess applicability to clinical practice

Quality Improvement in Health Care

Quality improvement (QI) involves systematic efforts to enhance health care services and patient outcomes.

• Continuous Actions: Ongoing processes to improve care quality and safety.

• Patient Access: Ensuring timely and equitable access to care.

• Evidence-Based Care: Providing care based on the best available evidence.

• Patient Engagement: Supporting patients in participating in their own care.

• Care Coordination: Integrating services across providers and settings.

• Cultural Competence: Communicating effectively with diverse patient populations.

Additional info: These concepts are foundational for understanding how health care professionals, especially nurses, use theory and research to inform evidence-based practice and quality improvement in personal and public health settings.