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Table 2 Baseline sociodemographic and clinical characteristics of participants with and without ADHD (N = 804)

From: Attention deficit hyperactivity disorder in adults who present with self-harm: a comparative 6-month follow-up study

 

ADHD, n = 93

No ADHD, n = 711

χ2

df

P

Missing data

n (%)

n (%)

  

na

Non-suicidal self-injury (NSSI)

27 (29)

111 (16)

10.4

1

.001

Women

70 (75)

471 (66)

3.04

1

.08, ns

Age group

 18–44

81 (87)

461 (65)

18.55

1

<.001

 45–64

11 (12)

169 (24)

6.75

1

.01

 65+

1 (1)

81 (11)

9.56

1

.002

Clinical diagnosisb

 Alcohol use disorder (F10.1/F10.2)

4 (4)

76 (11)

3.75

1

.05, ns

 Drug misuse disorder

(F11-F19, F17 excluded)

12 (13)

78 (11)

0.31

1

.58, ns

 Depression (F32.X and/or F33.X)

12 (13)

218 (31)

12.7

1

<.001

 Anxiety, stress (F40–49)

42 (45)

278 (39)

1.26

1

.26, ns

 Personality disorder (F60–69)

28 (30)

142 (20)

5.07

1

.02

 Emotionally unstable personality disorder (F60.3)

22 (24)

115 (16)

3.26

1

0.07, ns

 Autism spectrum disorder (F80–89)

21 (23)

33 (5)

42.2

1

<.001

WHO hazardous use cut-off, AUDIT

34 (51)

256 (48)

0.24

1

.63, ns

199

Trait impulsivity, SUAS 11

58 (62)

283 (40)

17.1

1

<.001

Impulsivity at index suicide attempt (n = 666), SIS 15

39 (60)

251 (43)

7.04

1

.01

14

High medical lethality, index suicide attempt (n = 666), C-SSRS

16 (25)

196 (35)

2.39

1

.12, ns

36

Recent relationship problems

70 (75)

456 (64)

4.44

1

.04

1

  1. ADHD Attention deficit hyperactivity disorder, AUDIT Alcohol Use Disorders Identification Test, SUAS 11 Suicide Assessment Scale item 11, SIS 15 Suicide Intent Scale item 15, C-SSRS Columbia Suicide Severity Rating Scale
  2. aNo significant differences in proportions missing between groups
  3. bParticipants could have more than one diagnosis