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Table 1 Demographic and clinical characteristics of subjects

From: Biomarker discovery in attention deficit hyperactivity disorder: RNA sequencing of whole blood in discordant twin and case-controlled cohorts

 

Non-Twin case controls

Discordant twins

N

n = 48: 23 ADHD, 21 controls

n = 32a (16 pairs)

Age in years (mean, SD)

10.63 (2.0)

12.29 (4.0)

Age (range)

7.47–14.8

8.08–17.86

% male

100%

75%

ADHD-RS T score “ADHD” (mean, SD)

65.6 (9)

62 (9)

ADHD RS T score “non-ADHD” (mean, SD)

43 (5.8)

47 (6.8)

% ever any mood disorder

12.5%

27%b

% ever any anxiety disorder

18.75%

30%

% current mood

2.2%

7%

% current anxiety

13%

27%

Comorbid dx at year of blood draw

2.2% mood; 13% anxiety

7% mood; 27% anxietyb

  1. a2 twin pairs (n = 4) scored very low on discordance ranking scale
  2. bMood and Anxiety reported for one or both twins. Based on 15 pairs, n = 30 (1 pair missing data, n = 2).