Evaluating Patient-Reported Outcome Measurement Comparability between Paper and Alternate Versions, Using the Lung Function Questionnaire as an Example

The steps described in this article provide a guide for evaluating whether to combine scores across administration versions to simplify analyses and interpretation under a crossover design. The guide recommends the investigation of item-level responses, summary scores, and participant usability/preference when comparing versions, with each step providing unique information to support comprehensive evaluation and informed decisions regarding whether to combine data.