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Table 3 Comparison Measurement Properties of CNFDS Adaptations and Construct Validity

From: Development, validity and reliability of the Italian version of the Copenhagen neck functional disability scale

 

Internal Consistency (α)

Test-Retest Reliability (ICC)

SEM - SDC

Structural Validity (explained variance)

Costruct Validity (correlation)

CNFDS (Jordan A et al.)

0.90

0.99 (same day) - 0.90 (by mail 2 days later)

/ - /

/

r = 0.83 with pain score

r = 0.89 with patient global assessment

r = 0.56 doctor global assessment

CNFDS France (Forestier R et al.)

0.83

/

/ - /

/

r = 0.45 with VAS

CNFDS Poland (Misterska F et al.)

0.90

0.93 (24 h)

/ - /

/

r = 0.87 with NDI

CNFDS Turkey (Yapali G et al.)

/

0.86 (7 days)

/ - /

/

r = 0.78 with NPDS

r = 0.73 with VAS

CNFDS Iran (Nayeb Aghaei H et al.)

0.84

0.95 (n.d.)

/ - /

/

r > 0.4 between each item and the three CNFDS subscales

r = 0.80 with mJOA

CNFDS Italy

0.83

0.99 (3 days)

3 points - 8.31 points

6.36

r = 0.85 with NDI-I

r = 0.71 with NBQ-I

r = 0.57 with VAS

  1. CNFDS Copenhagen Neck Functional Disability Scale, SEM Standard Error of Measurement, SDC Smallest Detectable Change, VAS Visual Analogue Scale, NPDS Neck Pain and Disability Scale, mJOA modified Japanese Orthopedic Association, NDI Neck Disability Index, NBQ Neck Bournemouth Questionnaire