Skip to main content

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).