TABLE 1.

Demographics of the final sample.

	Patients with cLBP	Pain-free volunteers	Statistics for group
	Mean (SD)	Mean (SD)	comparison
Sample size	n = 14	n = 14	n.a.
Age (years)	42.4 (11.6)	41.7 (12.5)	F(1,26) = 0.02, p = 0.89
Sex	11 males 3 females	10 males 4 females	X2(1,n = 28) = 0.19, p = 0.66
Handedness	13 right-handed 0 left-handed 1 ambidextrous	14 right-handed 0 left-handed 0 ambidextrous	X2(1,n = 28) = 1.04, p = 0.31
Pain duration	6–12 months: n = 1 1–2 years: n = 3 2–5 years: n = 8 >5 years: n = 2	n.a.	n.a.

n.a., not applicable.