Table 5.

The effect of NSLBP on postural sway for the COP parameter mean velocity (mVel)

Study	Duration (s)	Number of trials	Healthy controls Result (SD)	LBP patients (SD)	Pain severity (SD)
Luoto et al. [20]	15	1	Male:	Male:
			12 mm/s	14 mm/s	Moderate
				13 mm/s	Severe
	15	1	Female:	Female:
			11 mm/s	10 mm/s	Moderate
				20 mm/s	Severe
della Volpe et al. [2]	20	3	AP: 12.2 mm/s (1.2)	AP: 10.3 mm/s (0.6)	2–5 NRS-11
Lafond et al. [31]a	60	1	~3 mm/s	~5 mm/s	2.5 VAS
Mann et al. [19]a	30	1–3	~5 mm/s	~6.7 mm/s	6 (2) VAS
Salavati et al. [33]	30	3	15.9 mm/s (0.33)	13.7 mm/s (0.35)	<2.0 VAS

Visual analogue scale (VAS) ranging 0–10, 0–2 light pain; 3–5 light-to-moderate pain; 6–7 moderate-to-intense pain; 8–10 unbearable pain

NRS-11 ranging from 0 “no pain” to 10 “worst possible pain”

^aThe results presented have been extracted from bar-charts