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Table 1 Sample characteristics

From: Preliminary evidence for altered motion tracking-based hyperactivity in ADHD siblings

 

Children with ADHD (n = 45)

Non-affected siblings (n = 22)

Controls (n = 45)

ANOVA

 

M

SD

M

SD

M

SD

F2,109

p

Age in years

9.2

1.7

11.2

3.2

8.9

1.2

50.3a

< .001

% male

77.8

 

59.1

 

44.4

 

10.5a

.005

Conners parents DSM-IV

        

 Inattentive

64.1

11.8

57.1

13.4

47.4

7.6

26.8

<.001b

 Hyperactive-impulsive

70.0

9.5

51.0

13.6

52.7

8.8

38.8

<.001

 Total

70.0

7.3

55.6

11.3

51.3

7.0

61.8

<.001c

Conners’ teacher DSM-IV

        

 Inattentive

63.2

6.1

55.4”

10.0

52.9e

7.7

16.4

<.001c

 Hyperactive-impulsive

61.5

8.6

50.1d

3.5

53.5e

6.9

13.2

<.001c

 Total

64.3

7.3

55.4d

8.8

52.4e

7.2

20.8

<.001c

  1. Note. ADHD = Attention-deficit/hyperactivity disorder; DSM-IV = Diagnostic and Statistical Manual for Mental Disorders (4th edition).
  2. aχ 2.
  3. bThe ADHD and the non-affected siblings group differ significantly from the healthy control group (p < .05).
  4. cThe ADHD group differs significantly from the non-affected siblings group and from the healthy control group (p < .05).
  5. dMean and SD of Conners’ teacher ratings only available for 10 of the non-affected siblings.
  6. eMean and SD of Conners’ teacher ratings only available for 26 of the healthy controls.