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Table 2 Suicide communication/threats, attempts and methods in each diagnostic group#

From: Communication of suicide intent by schizophrenic subjects: data from the Queensland Suicide Register

 

Subjects with Schizophrenia

Subjects with Other Psychiatric Conditions (Group1)

Subjects with No Psychiatric Diagnosis (Group2)

 

n (%)

n (%)

n (%)

Lifetime communication of suicidal intent

 

(n = 108)

(n = 419)

(n = 808)

Yes

90 (83.3)

322 (76.8)

433 (53.6)

No

18 (16.7)

97 (23.2)

375 (46.4)

Group Comparisons ##

χ2 (2) = 84.57 ***

χ2 (1) = 2.12 ns

OR = 1.51(0.87,2.62)

χ2 (1) = 34.41 ***

OR = 4.33 (2.56,7.32)

Communication of suicidal intent 12-months prior

 

(n = 111)

(n = 429)

(n = 847)

Yes

85 (76.6)

278 (64.8)

391 (46.2)

No

26 (23.4)

151 (35.2)

456 (53.8)

Group Comparisons ##

χ2 (2) = 63.88 ***

χ2 (1) = 5.55 *

OR = 1.78 (1.10, 2.88)

χ2 (1) = 36.31 ***

OR = 3.81 (2.41,6.04)

Lifetime Suicide Attempt/s

 

(n = 119)

(n = 487)

(n = 969)

Yes

65 (54.6)

254 (52.2)

218 (22.5)

No

54 (45.4)

233 (47.8)

751 (77.5)

Group Comparisons ##

χ2 (2) = 151.01 ***

χ2 (1) = 0.23 ns

OR = 1.10 (0.74,1.65)

χ2 (1) = 56.83 ***

OR = 4.15 (2.80,6.13)

Suicide Attempt/s 12-months prior

 

(n = 118)

(n = 482)

(n = 972)

Yes

52 (44.1)

178 (36.9)

158 (16.3)

No

66 (55.9)

304 (63.1)

814 (83.7)

Group Comparisons ##

χ2 (2) = 99.87 ***

χ2 (1) = 2.04 ns

OR = 1.35 (0.90,2.02)

χ2 (1) = 52.33

*** OR = 4.06 (2.72,6.06)

No of Co-morbid Conditions

 

(n = 135)

(n = 538)

(n = 0)

One or more

39 (28.9)

62 (11.5)

-

None

96 (71.1)

476(88.5)

-

Group Comparisons ##

 

χ2 (1) = 25.51 ***

OR = 3.12 (1.98, 4.92)

 

Suicide Method

 

(n = 131)

(n = 526)

(n = 1120)

Drugs/poison

26 (19.3)

127 (23.8)

120 (10.2)

MV carbon monoxide

14 (10.4)

103 (19.3)

248 (21.0)

Hanging

45 (33.3)

154 (28.8)

437 (37.1)

Firearms

15 (11.1)

66 (12.4)

275 (23.3)

Jumping/lying before moving object

8 (5.9)

8 (1.5)

13 (1.1)

Other

27 (20.0)

76 (14.2)

86 (7.3)

Group Comparisons ##

χ2 (10) = 139.21 ***

χ2 (5) = 17.90 **

χ2 (5) = 64.92 ***

  1. #Sample sizes for each variable indicated, with unknown cases not included in individual analyses.
  2. ## Comparisons provided for differences between the 3 diagnostic groups (column 2), and for comparison Group1 and Group2 (columns 3 and 4). Significance: * p < .05, ** p < .01, *** p < .001. Odds Ratios (confidence interval) provide the strength and direction of the relationship, indicating the liklihood of subjects with schizophrenia being more (>1) or less likely (<1) than those with other psychiatric disorders (Column3) or those with no identified disorder (Column 4) to exhibit the charactristic (ie suicidal ideation or attempt or the presence of co-morbid conditions).