All three physical activity experience scores (amount, difficulty and total score) can be used as primary or secondary endpoint measures in clinical trials. In order to interpret your findings, remember:
- Amount domain: higher values represent a higher amount of activity.
- Difficulty domain: higher values represent a lesser degree of difficulty.
- Total score: higher values indicate a better score.
Improving physical activity of COPD patients is: (i) to improve the amount without negative impact on difficulty; (ii) to improve difficulty without negative impact on amount; or (iii) to improve both amount and difficulty. This may be of particular interest to understand the mechanisms through which short and long term interventions result in benefits.
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