Which statement correctly identifies a baseline's role?

• A. A baseline is the final value after analysis.
• B. A baseline is a reference point used for comparison to measure change.
• C. A baseline is the minimum observed value.
• D. A baseline is unrelated to data interpretation.

Answer: (B)

Baseline data act as a reference point against which you gauge changes over time. It captures the starting condition before any intervention, so you can see what shifts occur when you measure again. This lets you quantify impact and determine whether outcomes moved in the desired direction, often as differences or percent changes relative to that starting point. It’s the starting point for interpretation, not the final result or necessarily the minimum value, and it’s essential for understanding how data change.