Table 3.

Correlations between lumbar repositioning errors (REs) and relative proprioceptive weighting (RPW) in people with chronic low back pain (CLBP) and asymptomatic controls.

	Variables	Spearman's rank correlation coefficients	p-value
CLBP young (18–44 years)	RPW on stable surface and lumbar RE	−0.02	0.9
	RPW on unstable surface and lumbar RE	0.11	0.6
CLBP middle-aged (45–65 years)	RPW on stable surface and lumbar RE	−0.15	0.3
	RPW on unstable surface and lumbar RE	0.07	0.6
Asymptomatic young (18–44 years)	RPW on stable surface and lumbar RE	−0.20	0.3
	RPW on unstable surface and lumbar RE	0.02	0.9
Asymptomatic middle-aged (45–65 years)	RPW on stable surface and lumbar RE	0.20	0.2
	RPW on unstable surface and lumbar RE	0.67	0.1

Calculation of p-values and correlation coefficients was performed using Spearman rank correlation test. The Spearman correlation coefficient values can range from +1 to −1 where +1 indicates a perfect positive association of ranks, 0 indicates no association between ranks and −1 indicates perfect negative association of ranks. The strength of the correlation can be classified as very weak (0.00–0.19), weak (0.20–0.39), moderate (0.40–0.59), strong (0.60–0.79), and very strong (0.80–1.0).