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Table 1 Descriptive item and scale statistics and results of confirmatory factor analyses

From: Dimensionality and scale properties of the Edinburgh Depression Scale (EDS) in patients with type 2 diabetes mellitus: the DiaDDzoB study

   

Factor Loadings

   

CFA

Polychoric 1

FI One-Factor

Model2

Bifactor Model

 

Item Content

Item Mean (SD)

β -

 

General

Factor

Specific

Factor

1

I have been able to laugh and see the funny side of things

0.37 (0.73)

.82

.69

.62

.63

2

I have looked forward with enjoyment to things

0.42 (0.82)

.81

.68

.61

.74

3*

I have blamed myself unnecessarily when things went wrong

1.06 (0.86)

.52

.51

.53

--

4

I have been anxious or worried for no good reason

0.90 (0.89)

.65

.64

.65

--

5*

I have felt scared or panicky for no very good reason

0.78 (0.83)

.70

.69

.71

--

6*

Things have been getting on top of me

0.81 (0.76)

.75

.74

.75

--

7*

I have been so unhappy that I have had difficulty sleeping

0.62 (0.80)

.80

.79

.80

--

8*

I have felt sad or miserable

0.53 (0.67)

.84

.83

.83

--

9*

I have been so unhappy that I have been crying

0.28 (0.53)

.74

.73

.73

--

10*

The thought of harming myself has occurred to me

0.09 (0.37)

.67

.67

.68

--

Sum score

5.86 (4.78)

    

Reliability

.843

 

.83

.83

 
  1. * item recoded in order that higher scores indicate higher levels of depression
  2. 1CFA Polychoric = Confirmatory Factor Analysis on Polychoric correlation matrix; 2FI One-Factor Model = Full-Information One-Factor Model; 3Cronbach's alpha