Structural Integration as an Adjunct to Outpatient Rehabilitation for Chronic Nonspecific Low Back Pain: A Randomized Pilot Clinical Trial

Table 6

Parameter estimates from linear mixed effects model of longitudinal VAS Pain data.

Parameter	Estimate	SE	^1
Intercept	31.53 mm	4.75	n/a
Group^2	3.06 mm	4.94	0.5364
RMDQ	1.91 mm	0.43	<0.0001^3
Days	−0.05 mm/day	0.03	<0.0001^3
Days-group^2	−0.14 mm/day	0.05	0.0039^4

SE: standard error.
¹Wald type 3 F tests of fixed effects; ²Group parameters estimate the amount by which the values for SI + OR differ from those for OR alone; ³; ⁴.