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Table 1 Reliability (Internal Consistency, Reliability & Measurement Error) Findings Based on Each Measure

From: The assessment of depression in people with multiple sclerosis: a systematic review of psychometric validation studies

Authors (Date)

Measure

Reliability (Cronbach’s Alpha)

Internal consistency (Inter-Item Correlations)

Test-test Reliability

Measurement error

Moran & Mohr (2005) [39]

BDI

   

BDI SEM = 3.26; HRSD SEM = 3.20

Aikens et al. (1999) [24]

BDI-II

Full BDI α = .86,

Cognitive / Affective α = .85

Somatic α = .64

BDI-18 α = .84

   

Amtmann et al. (2014) [33]

PHQ-9; CESD-10;

PROMIS-D-8

 

PHQ-9 = .35-.67; CESD-10 = .33-.67; PROMIS-D-8 = .75-.84

  

Sjonnesen et al. (2012) [46]

PHQ-9

α = .82

Item-total correlations (PwMS): anhedonia (.71); depressed mood (.65); fatigue (.57) and concentration (.55).

  

Chang et al. (2003) [37]

CMDI

Sleep Disturbance α = .64

Cognitive Inefficiency α = .86

Fatigue α = .94

Evaluative α = .82

Mood α = .95

   

Solari et al. (2003) [49]

CMDI

MS

Vegetative α = .88

Evaluative α = .7

Mood α = .93

Item-subscale: mood = .58-.80, evaluative = .37-.70, vegetative = .32-.57

ICC = 0.78 (95 % CI 0.62–0.89); Subscales range 0.71–0.79 (2 weeks)

 

Patten et al. (2010) [45]

CES-D

  

r = .69 over 1 year; r = .70 over 2 years; r = .65 over 3 years; r = .73 year 1-year 2; r = .73 year 2-year 3

 

Verdier-Taillefer et al. (2001) [48]

CES-D

α = .90

   
  1. Note: HRSD = Hamilton Rating Scale for Depression