Do motor control genes contribute to interindividual variability in decreased movement in patients with pain?

Molecular Pain

Table 3 Variables that contribute to baseline Roland-Morris motor limitation subscale score.

Quantitative variable	N	Mean	STD	Correlation (r) with baseline Roland-Morris		R²	p-value
SF-36 Vitality	309	40.00	21.74	-0.5384		0.2898	<0.0001
SF-36 Emotional Role	306	51.74	42.84	-0.3410		0.1163	<0.0001
Age	311	42.03	10.90	-0.0368		0.0014	0.5175
				Baseline Roland-Morris
Categorical variable	Category		n	Mean	STD
Med vs. surgical treatment	Surgical		183	12.38	3.12	0.1605	<0.0001
	Medical		128	9.02	4.60
Workman's compensation	Yes		114	11.67	3.77	0.0154	0.0288
	No		197	10.60	4.29
Marital status	Married/living together		244	11.00	4.18	0.0244	0.0223
	Never Married		29	9.38	4.35
	divorced/separated/widow		38	12.18	3.30
Neurological exam deficits	0		76	9.74	4.51	0.0431	0.0037
each class	1		106	10.98	4.36
(motor, sensory, reflex)	2		97	11.64	3.50
counts for1	3		31	12.45	3.21
Sex	Male		189	11.01	4.17	0.0000	0.9505
	Female		122	10.98	4.09
R-square from the model including all above eight variables (n = 302 patients, model df = 9)						0.4420

Note: In the Maine Lumbar Spine Study, patients were asked to answer yes or no to each question to describe their condition "today," at study entry after referral to a specialist for acute or subacute sciatica. The total score is the number of items answered "yes." We selected the items in bold type as a "movement impairment" subscale.

ISSN: 1744-8069