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Table 7 QOLPAD item intercorrelations (Spearman’s correlation coefficient) at baseline

From: Development and validation of a disease-specific quality of life questionnaire for patients with peripheral artery disease (QOLPAD)

Item #

1

2

3

4

5

6

7

8

9

10

11

2

0.69

          

3

0.42

0.27

         

4

0.06

 − 0.03

0.05

        

5

0.26

0.13

0.24

0.29

       

6

 − 0.34

 − 0.19

 − 0.31

 − 0.05

 − 0.30

      

7

0.17

0.21

0.25

 − 0.06

 − 0.05

 − 0.13

     

8

0.13

0.17

 < 0.01

0.08

0.24

 − 0.12

0.18

    

9

0.21

0.15

0.18

0.27

0.30

 − 0.15

0.17

0.12

   

10

 − 0.23

 − 0.13

 − 0.14

 − 0.24

 − 0.26

0.27

 − 0.10

 − 0.11

 − 0.24

  

11

0.34

0.31

0.36

0.19

0.32

 − 0.25

0.21

0.19

0.40

 − 0.29

 

12

0.34

0.36

0.26

 − 0.07

 − 0.01

 − 0.21

0.22

 − 0.02

0.23

 − 0.15

0.50