Which type of theory focuses on clinical nursing practice?

The PICO format is a widely used tool in evidence-based practice (EBP) to develop focused clinical questions that guide the search for relevant evidence. PICO stands for: P = Population or Problem, I = Intervention, C = Comparison, O = Outcome.

Rationale for correct answer:

C. Use of inhalers: This is the “O” (Outcome). The goal of the project is to determine whether the use of inhalers is affected by the type of education provided. It is the measurable result that reflects the effectiveness of the interventions.

Rationale for incorrect answer:

A. Electronic gaming education: This is the “I” (Intervention). It is the new or experimental strategy being evaluated to see if it improves inhaler use compared to the standard approach.

B. Educational book: This is the “C” (Comparison). The educational book is the alternative to the main intervention and is used as a point of comparison to the electronic gaming module.

D. Electronic gaming education: This is the “I” (Intervention). It is the new or experimental strategy being evaluated to see if it improves inhaler use compared to the standard approach.

Take home points:

• The "Outcome" in a PICO question refers to the measurable result or effect the researchers hope to evaluate.
• Understanding how to break down a clinical question using the PICO framework strengthens evidence-based practice

Nursing theories vary in scope and purpose. Some describe phenomena (descriptive), some explain growth and changes (developmental), others explore complex interactions (systems), and some directly guide clinical decision-making (prescriptive).

Rationale for correct answer:

A. Prescriptive theories guide nursing interventions, predict outcomes, and provide direct instructions for clinical practice.

Rationale for incorrect answers:

B. Descriptive theory: Descriptive theories explain or describe a phenomenon without directing specific nursing actions.

C. Developmental theory: Focuses on the process of growth and development across the lifespan, not on nursing interventions.

D. Systems theory: Examines how components of a system interact, useful for understanding healthcare environments but not specifically for guiding direct care actions.

Take home points

• Prescriptive theories are designed to guide nursing interventions and predict patient outcomes.
• Different theory types serve different purposes-choosing the right one depends on whether you’re describing, explaining, or applying nursing knowledge.