Which statement best describes systematic reviews?

• A. Describes a single patient in depth
• B. Randomizes subjects into groups
• C. Summarizes findings from multiple studies and recommends practice changes
• D. Measures back height to guide practice

Answer: (C)

Systematic reviews synthesize evidence from multiple studies using a predefined method to search for, appraise, and combine results, often with a meta-analysis, and they inform practice changes. This approach brings together findings from several investigations to provide a higher-level view that helps guide clinical decisions. It differs from describing a single patient in depth (a case report) and from studies that involve assigning participants to groups to test interventions (randomized trials) or from focusing on a single clinical measurement to guide care.