Table 8.

Spearman Correlation Coefficients between NDI0, COM, NPQ, VAS, CSQ, and SF-12 (Day 15).

	VAS (referred pain)	CSQ	NDI	NPQ	Physical Component Summary (PCS-12)	Mental Component Summary (MCS-12)	COM
VAS (NP)	0.519	0.584	0.697	0.699	-0.458	-0.274	0.610
P	0.000	0.000	0.000	0.000	0.000	0.000	0.000
n	221	219	221	221	214	214	215
VAS (referred pain)		0.384	0.468	0.489	-0.427	-0.170	0.458
P		0.000	0.000	0.000	0.000	0.013	0.000
n		219	221	221	214	214	215
CSQ			0.667	0.669	-0.536	-0.357	0.567
P			0.000	0.000	0.000	0.000	0.000
n			219	219	212	212	213
NDI				0.908	-0.574	-0.409	0.693
P				0.000	0.000	0.000	0.000
n				221	214	214	215
NPQ					-0.611	-0.380	0.706
P					0.000	0.000	0.000
n					214	214	215
Physical Component Summary (PCS-12)						-0.046	-0.594
P						0.503	0.000
n						214	210
Mental Component Summary (MCS-12)							-0.326
P							0.000
n							210