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Table 4 Convergent and discriminant construct validity of the CDIP-58

From: The Cervical Dystonia Impact Profile (CDIP-58): Can a Rasch developed patient reported outcome measure satisfy traditional psychometric criteria?

Instrument Scale/
Dimension/
Variable
        
  Validity
(Correlation)
Head and
Neck
Symptoms
(6 items)
Pain and
Discomfort
(5 items)
Upper
Limb
Activities
(9 items)
Walking
(9 items)
Sleep
(4 items)
Annoyance
(8 items)
Mood
(7 items)
Psycho-
social
Funct-ioning
(10 items)
CDIP-58 Head and Neck Symptoms         
  Pain and Discomfort 0.72 a -       
  Upper Limb Activities 0.64 0.53 -      
  Walking 0.63 0.65 0.79 a -     
  Sleep 0.50 0.53 0.54 0.50 -    
  Annoyance 0.63 0.55 0.60 0.56 0.52 - -  
  Mood 0.52 0.48 0.54 0.53 0.49 0.84 a -  
  Psychosocial Functioning 0.67 0.51 0.55 0.53 0.44 0.73 a 0.69 -
SF-36* Bodily Pain -0.60 -0.71 b -0.72 -0.62 -0.59 -0.54 -0.51 -0.48
  Social Functioning -0.56 -0.56 -0.70 -0.62 -0.55 -0.63 -0.59 -0.69 b
  Physical Functioning -0.45 -0.57 -0.80 b -0.78 b -0.53 -0.43 b -0.43 b -0.45
  Mental Health -0.43 -0.41 b -0.72 b -0.40 b -0.43 -0.73 b -0.78 b -0.60
HADS Anxiety 0.34 0.39 b 0.31 b 0.28 b 0.31 0.54 b 0.66 b 0.48
  Depression 0.41 0.45 b 0.52 b 0.51 b 0.42 0.59 b 0.60 b 0.50
GHQ** Anxiety 0.30 0.30 b 0.34 b 0.19 b 0.22 0.44 b 0.50 b 0.30
  Depression 0.35 0.29 b 0.31 b 0.36 b 0.18 0.53 b 0.66 b 0.43
Demo-graphic Age -0.05 -0.03 -0.02 0.01 0.00 -0.04 -0.07 0.00
Variables Sex -0.04 -0.17 0.02 -0.07 0.00 0.06 0.04 0.02
  Education -0.04 -0.05 -0.01 -0.07 -0.02 -0.03 -0.03 -0.08
  1. *4/8 scales omitted from table as not applicable to analyses; **2/8 scales omitted from table as not applicable to analyses
  2. aCorrelations falling outside of the predicted range; bCorrelations consistent with predictions