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Table 4 Item-total correlation analyses for the NDI-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

Questions of NDI

Test

 

Retest

 
 

rs

p value

rs

p value

Pain intensity

0.60

<0.001

0.59

<0.001

Personal care

0.60

<0.001

0.71

<0.001

Lifting

0.73

<0.001

0.69

<0.001

Reading

0.70

<0.001

0.81

<0.001

Headaches

0.43

<0.001

0.56

<0.001

Concentration

0.76

<0.001

0.73

<0.001

Work

0.68

<0.001

0.72

<0.001

Driving

0.63

<0.001

0.65

<0.001

Sleeping

0.68

<0.001

0.59

<0.001

Recreation

0.77

<0.001

0.62

<0.001

  1. NDI-PL- Polish language version of the Neck Disability Index
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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