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Table 2 Distribution of minimal and maximal scores, mean scores, 95% confidence interval in NDI-PL and CNFDS-PL

From: Cross-cultural adaptation of the Neck Disability Index and Copenhagen Neck Functional Disability Scale for patients with neck pain due to degenerative and discopathic disorders. Psychometric properties of the Polish versions

   

Test

     

Retest

   
 

Min

Max

Mean

value

95%

Confidence

interval

SD

Min

Max

Mean

value

95%

Confidence

interval

SD

    

from

to

    

from

to

 

NDI-PL

            

   Total score

3

36

21.6

19.6

23.6

7.9

3

42

20.6

18.5

22.6

8.0

   Pain intensity

0

5

2.1

1.8

2.3

1.0

0

5

2.0

1.7

2.2

1.0

   Personal care

0

4

1.3

1.0

1.5

0.9

0

4

1.2

1.0

1.4

0.9

   Lifting

0

5

2.6

2.2

3.0

1.6

0

5

2.6

2.2

2.9

1.4

   Reading

0

4

2.4

2.2

2.7

1.0

0

5

2.4

2.1

2.7

1.2

   Headaches

0

5

2.4

2.1

2.8

1.4

0

5

2.1

1.8

2.5

1.4

   Concentration

0

4

1.5

1.2

1.7

1.0

0

5

1.4

1.1

1.7

1.0

   Work

0

5

2.6

2.3

2.9

1.2

0

5

2.4

2.1

2.7

1.2

   Driving

0

5

2.8

2.3

3.2

1.4

0

5

2.7

2.3

3.1

1.3

   Sleeping

0

5

2.2

1.9

2.5

1.2

0

5

2.1

1.7

2.5

1.4

   Recreation

0

5

2.5

2.2

2.9

1.3

0

5

2.4

2.0

2.7

1.3

CDS-PL

            

Total score

0

30

17.7

15.5

19.8

8.3

0

30

17.7

15.6

19.9

8.3

   Pain severity

0

6

3.9

3.4

4.4

1.9

0

6

3.4

3.4

4.5

2.1

   Disability

0

16

9.0

7.9

10.1

4.4

0

16

7.6

7.6

9.9

4.3

   Social interaction

0

8

4.8

4.1

5.5

2.7

0

8

4.3

4.3

5.7

2.7

  1. NDI-PL-Polish language version of the Neck Disability Index; the score range: 0-100%
  2. CDS-PL- Polish language version of the Copenhagen Neck Functional Disability Scale