Table 6.

Correlation values between the VAS and the NDI and SF36

	r value	95% CI	P value
NDI	0.50	0.37 to 0.61	0.000
SF36 Physical	−0.11	−0.26 to 0.04	0.18 NS
SF36 Role Physical	−0.28	−0.41 to −0.13	0.001
SF36 Pain	−0.51	−0.61 to −0.38	0.000
SF36 General Health	−0.20	−0.34 to −0.05	0.016
SF36 Energy	−0.33	−0.47 to −0.19	0.000
SF36 Social	−0.33	−0.46 to −0.18	0.000
SF36 Role Mental	−0.25	−0.39 to −0.09	0.003
SF36 Mental Health	−0.31	−0.45 to −0.17	0.000