Table 3 Spearman’s correlation coefficients (95% confidence interval) between the ZCQ and the ODI and SF-12v2.

From: Reliability, validity and minimum clinical importance difference of the Chinese version of the Zurich claudication questionnaire

Measure

baseline data (n = 105)

follow-up data (n = 79)

ZCQ symptom

ZCQ function

ZCQ symptom

ZCQ function

ZCQ symptom

1.000

–

1.000

–

ZCQ function

0.606**

1.000

0.597**

1.000

ODI

0.713**

0.817**

0.646**

0.768**

SF-12v2 PCS

− 0.416**

− 0.498**

− 0.527**

− 0.471**

SF-12v2 MCS

− 0.506**

− 0.402**

− 0.466**

− 0.353**

  1. ZCQ: Zurich claudication questionnaire; ODI: Oswestry Disability Index; SF-12v2:12-Item Short Form Survey Version 2; PCS: Physical Component Summary; MCS: Mental Component Summary. ** Significant correlation at 0.05 level (two-tailed).
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