Skip to main content

Table 2 Means (M), standard deviation (SD), skewness, kurtosis, and corrected item-total correlations (rtot) for all IDS-SR30 items

From: Psychometric properties of the IDS-SR30 for the assessment of depressive symptoms in spanish population

IDS-SR Items

First assessment

Second assessment

 

M (SD)

Skewness

Kurtosis

rtot

M (SD)

Skewness

Kurtosis

rtot

1. Initial insomnia

1.41 (0.99)

0.11

-1.03

0.50

0.59 (0.68)

0.93

0.54

0.43

2. Middle insomnia

1.44 (1.08)

0.13

-1.25

0.55

0.56 (0.77)

1.26

0.91

0.52

3. Early morning awakening

1.14 (1.15)

0.45

-1.28

0.56

0.33 (0.87)

2.19

4.46

0.47

4. Sleeping to much

0.22 (0.58)

2.99

9.27

0.03

0.20 (0.47)

2.56

7.55

0.16

5. Feeling sad

1.92 (0.91)

-0.33

-0.88

0.75

0.77 (0.70)

0.71

0.60

0.73

6. Feeling irritable

1.15 (0.80)

0.24

-0.49

0.49

0.54 (0.59)

0.66

0.10

0.58

7. Feeling anxious or tense

1.52 (0.78)

0.04

-0.40

0.57

0.72 (0.61)

0.48

0.54

0.63

8. Reactivity of mood

1.53 (0.93)

-0.01

-0.85

0.75

0.53 (0.65)

1.02

0.84

0.70

9. Diurnal variation of mood

1.04 (0.94)

0.52

-0.70

0.29

0.55 (0.69)

1.22

1.42

0.48

10. Quality of mood

1.62 (0.93)

-0.09

-0.87

0.63

0.65 (0.81)

1.14

0.66

0.68

11+12. Appetite disturbance

1.03 (0.87)

0.52

-0.40

0.57

0.36 (0.58)

1.63

2.85

0.49

13+14. Weight disturbance

1.07 (1.08)

0.57

-0.99

0.50

0.38 (0.74)

2.12

3.99

0.35

15. Concentration/decision-making

1.65 (0.87)

0.07

-0.81

0.72

0.80 (0.66)

0.47

0.25

0.68

16. Self criticism and blame

1.33 (0.89)

0.24

-0.64

0.67

0.53 (0.68)

1.23

1.47

0.68

17. Future pessimism

1.66 (0.83)

0.17

-0.77

0.72

0.83 (0.67)

0.58

0.66

0.68

18. Suicidal thoughts

0.77 (0.77)

0.77

0.15

0.62

0.21 (0.45)

2.15

5.11

0.55

19. Interest in people/activities

1.69 (0.97)

0.01

-1.12

0.76

0.68 (0.71)

0.96

1.12

0.73

20. Energy/fatigability

1.59 (0.85)

0.10

-0.67

0.75

0.77 (0.66)

0.63

0.72

0.71

21. Pleasure or enjoyment (not sex)

1.50 (0.82)

0.29

-0.52

0.74

0.67 (0.62)

0.62

0.29

0.72

22. Interest in sex

1.78 (1.03)

-0.25

-1.14

0.61

1.06 (0.92)

0.62

-0.38

0.52

23. Psychomotor retardation

1.13 (0.86)

0.41

-0.48

0.68

0.42 (0.58)

1.15

0.71

0.64

24. Psychomotor agitation

0.91 (0.78)

0.69

0.25

0.44

0.38 (0.58)

1.51

2.54

0.55

25. Aches and pains

1.05 (0.70)

0.37

0.18

0.47

0.60 (0.62)

0.69

0.37

0.57

26. Sympathetic arousal

1.00 (0.77)

0.41

-0.24

0.51

0.48 (0.60)

1.00

0.76

0.56

27. Panic/phobic symptoms

0.56 (0.83)

1.32

0.80

0.36

0.19 (0.47)

2.65

7.39

0.43

28. Constipation/diarrhoea

0.57 (0.78)

1.34

1.30

0.37

0.34 (0.59)

1.93

4.27

0.32

29. Interpersonal sensitivity

1.17 (0.95)

0.44

-0.70

0.54

0.54 (0.65)

1.08

1.14

0.58

30. Leaden paralysis/Physical energy

1.38 (0.87)

0.19

-0.62

0.65

0.66 (0.69)

0.88

0.67

0.65

  1. Note: The SE of skewness was 0.06 at first and second assessment. The SE of kurtosis was 0.12 at first and second assessment.
Back to article page

BMC Medical Research Methodology

ISSN: 1471-2288

Contact us