What is the distinction between “effectiveness” and “efficacy” in EIP?

The distinction between effectiveness and efficacy is crucial in Evidence-Informed Practice. Effectiveness refers to how well a treatment works in real-world settings, encompassing a broader and more diverse population, including those with various comorbidities and varying adherence levels. It measures the outcomes when the treatment is applied in everyday clinical practice, considering various external factors that may influence results.

On the other hand, efficacy measures how well a treatment works under controlled conditions, typically in clinical trials with strict protocols and selected participants who meet specific criteria. This controlled environment minimizes external variability, allowing researchers to ascertain the maximum potential of an intervention in ideal circumstances.

Understanding this distinction helps healthcare professionals evaluate treatments and interventions based on where and how they will be applied in practice, guiding better decision-making for patient care.