The association between different outcome measures and prognostic factors in patients with neck pain: a cohort study

Birgitte Lawaetz Myhrvold; Alice Kongsted; Pernille Irgens; Hilde Stendal Robinson; Nina K Vøllestad

doi:10.1186/s12891-022-05558-5

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 intensity	NDI	EQ-5D
	n = 941	n = 939	n = 941
Baseline outcome variables/Model	Adjusted R²	Adjusted R²	Adjusted R²
Baseline pain intensity (only Block 5a)	0.11	0.11	0.05
Baseline NDI (only Block 5b)	0.19	0.53	0.26
Baseline EQ-5D (only Block 5c)	0.11	0.26	0.34
Final model (Block 1 to 4), no baseline variable	0.22	0.37	0.21
Final model and baseline pain intensity (Block 1 to 5a)	0.25	0.39	0.22
Final model and baseline NDI (Block 1 to 5b)	0.27	0.60	0.31
Final model and baseline EQ-5D (Block 1 to 5c)	0.25	0.47	0.42

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