Table 6.

Correlation coefficient r between RMDQ, ergometry test, dynamic lifting test (dyn. lift test), VAS, SF-36 physical functioning (SF-36 phys.) and SF-36 general health (SF-36 gen.) γ significant at P< 0.05

	RMDQ	Ergometry test	Dyn. lift test	VAS	SF-36 phys.	SF-36 gen.
RMDQ	1.00	−0.37	−0.62 γ	−0.85 γ	−0.87 γ	−0.63 γ
Ergometry test	−0.37	1.00	0.38	0.26	0.41	0.33
Dyn. lift test	−0.62 γ	0.38	1.00	0.71 γ	0.59 γ	0.37
VAS	−0.85 γ	0.26	0.71 γ	1.00	0.71 γ	0.52 γ
SF-36 phys.	−0.87 γ	0.41	0.59 γ	0.71 γ	1.00	0.65 γ
SF-36 gen.	−0.63 γ	0.33	0.37	0.52 γ	0.65 γ	1.00