Table 2 Descriptive statistics of classification variables used in k means cluster analysis.

From: Emotional dysregulation subgroups in patients with adult Attention-Deficit/Hyperactivity Disorder (ADHD): a cluster analytic approach

 

Cluster 1 (n = 181)

Cluster 2 (n = 204)

Cohen’s d

Welch-test

Mean

SD

Mean

SD

CAARS-S

   Inattention/Memory Problems

21.96

6.27

25.27

6.06

0.54

p < 0.0001

   Hyperactivity/Restlessness

18.33

7.47

22.61

7.15

0.59

p < 0.0001

   Impulsivity/Emotional Lability

17.51

6.00

24.97

5.52

1.30

p < 0.0001

   Problems with Self-Concept

9.51

4.42

13.99

3.24

1.17

p < 0.0001

CAARS-O

   Hyperactivity/Restlessness

15.13

7.23

19.05

7.91

0.51

p < 0.0001

   Impulsivity/Emotional Lability

16.08

7.10

21.98

7.87

0.79

p < 0.0001

   Problems with Self-Concept

9.30

4.32

12.42

3.98

0.75

p < 0.0001

BDI

12.22

8.69

27.23

11.43

1.47

p < 0.0001

EMO-Check

   Positive Affect

46.27

18.52

28.22

16.97

1.02

p < 0.0001

   Negative Affect

25.89

14.22

49.41

14.98

1.61

p < 0.0001

ERSQ

62.53

19.20

44.48

17.07

1.00

p < 0.0001

SCL90R GSI

0.66

0.39

1.45

0.59

1.57

p < 0.0001

SCID-II

   self-defeating

2.49

M: 2.48

1.92

4.56

1.81

1.11

p < 0.0001

   dependent

2.65

M: 2.51

1.73

4.57

1.59

1.16

p < 0.0001

   negativistic

2.88

M: 2.91

1.65

5.29

1.57

1.51

p < 0.0001

   depressive

2.69

M: 2.69

1.90

5.81

1.60

1.79

p < 0.0001

   paranoid

2.24

M: 2.09

1.78

4.70

1.93

1.33

p < 0.0001

   narcissistic

2.71

M: 2.41

2.23

5.48

M: 5.16

3.46

0.94

p < 0.0001

   borderline

4.77

M: 4.59

3.14

9.57

2.57

1.69

p < 0.0001

  1. M = Huber’s M estimator. Welch tests and effect sizes Cohen’s d were calculated to assess differences between clusters. The significance value was adjusted for multiple testing: p = 0.05/19 = 0.0026.
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