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What is the primary objective when determining the effectiveness of an intervention?

  1. Whether the intervention is safe

  2. The extent of the desired outcomes achieved

  3. Cost-effectiveness of the intervention

  4. How well the intervention works under controlled conditions

The correct answer is: The extent of the desired outcomes achieved

The primary objective when determining the effectiveness of an intervention is to assess the extent of the desired outcomes achieved. This is crucial because effectiveness focuses on the actual results and benefits that the intervention delivers in real-world settings. Measuring outcomes allows practitioners to evaluate whether the intervention meets its intended goals, such as improving health, enhancing patient satisfaction, or achieving specific clinical results. While safety is an important consideration when evaluating any intervention, it primarily relates to the potential risks involved rather than its effectiveness. Cost-effectiveness does play a role in evaluating overall feasibility and sustainability but does not directly measure how well the intervention works in achieving its intended outcomes. Evaluating how well the intervention works under controlled conditions is pertinent, especially in the initial research phase, but it does not provide a full picture of effectiveness in everyday practice. Therefore, focusing on the extent of the desired outcomes is essential for understanding the intervention's impact and success.