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Table 1 Methods employed in connection with index episode of self-harm in patients 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

 

Index suicide attempta

Index NSSI

ADHD, n = 66

No ADHD, n = 600

χ2

df

P

ADHD, n = 27

No ADHD, n = 111

χ2

df

P

n (%)

n (%)

   

n (%)

n (%)

   

Methodb

 Poisoningc

39 (59)

361 (60)

0.03

1

.87, ns

7 (26)

19 (17)

1.10

1

.29, ns

 Gassing

1 (2)

5 (0.8)

0.31

1

.58, ns

 Hanging/strangulation/choking

8 (12)

70 (12)

0.01

1

.91, ns

2 (7)

3 (3)

1.38

1

.24, ns

 Drowning

15 (3)

1.69

1

.19, ns

 Cutting

12 (18)

105 (18)

0.02

1

.89, ns

16 (59)

79 (71)

1.44

1

.23, ns

 Jumping

2 (3)

21 (4)

0.04

1

.84, ns

 Vehicular

3 (5)

23 (4)

0.08

1

.78, ns

1 (0.9)

0.25

1

.62, ns

 Firearm/explosives

3 (0.5)

0.33

1

.57, ns

 Other method

3 (5)

15 (3)

0.95

1

.33, ns

6 (22)

15 (14)

1.28

1

.26, ns

  1. ADHD Attention deficit hyperactivity disorder, NSSI Non-suicidal self-injury
  2. aOnly actual suicide attempts as defined by the Columbia Suicide Severity Rating Scale
  3. bMore than one method could be reported
  4. cSingle method