Table 1 An overview of the variables of interest for the analysis.
Variable name | Variable type | Data type | Description/transformation |
|---|---|---|---|
Patient reported low back pain intensity/numerical rating scale [NRS] | Primary outcome | Continuous data [0:10] | The mean value of each NRS score in the low back pain rating scale (current, average and worst low back pain intensity) |
Lumbar stiffness/global stiffness [GS] | Secondary outcome | Continuous data [0–∞] | The average slope of the force–displacement curve from the second lowest load to the second highest load allowed by protocol (~ 83 N) measured at each segment. For the analyses a mean sum score for all segments were applied |
Pain sensitivity/pressure pain threshold [PPT] | Secondary outcome | Continuous data [0:1,000] | A mean score of the 3 trials (kPa) measured at each level, and for the analysis a mean sum score for all segments were applied |
