Table 5

The explained variance (Adjusted R2) between baseline outcome variables, predictors and NDI, EQ-5D or pain intensity as outcome after 12 weeks explored by linear regression analysis

Outcomes
Pain intensityNDIEQ-5D
n = 941n = 939n = 941
Baseline outcome variables/ModelAdjusted R2Adjusted R2Adjusted R2
Baseline pain intensity (only Block 5a)0.110.110.05
Baseline NDI (only Block 5b)0.190.530.26
Baseline EQ-5D (only Block 5c)0.110.260.34
Final model (Block 1 to 4), no baseline variable0.220.370.21
Final model and baseline pain intensity (Block 1 to 5a)0.250.390.22
Final model and baseline NDI (Block 1 to 5b)0.270.600.31
Final model and baseline EQ-5D (Block 1 to 5c)0.250.470.42

Note: The scales are transformed to a 0–100 scale for both baseline and outcome

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