Table 3.

Linear regression model results, testing the effect of group on changes in measured variables while controlling for the baseline value of the dependent variable.

	Schober_test_ delta	forward_flexion_distance_delta	ODI_delta
Predictors	B(SE)	B(SE)	B(SE)
(Intercept)	0.91 (1.14)	−1.14 (1.21)	2.08 (1.22)
group moderate disability vs control	−0.30 (0.55)	6.31 ** (1.67)	5.25 *(2.00)
group minimal disability vs control	−0.29 (0.55)	0.15 (1.68)	0.64 (1.38)
baseline	−0.02 (0.18)	0.20 (0.10)	0.06 (0.14)
Observations	20	20	20
ES group	0.03	0.46	0.54

ES: partial η², effect size, according to [40] considered 0.01 partial eta squared effect as small, 0.06 considered medium and 0.14 considered large.

Baseline: the dependent variable value at T1 change is with 2.25 units higher than the control.

Delta = Variable’s value in T1 – T2.