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Table 2 Results of intergroup comparison

From: The characteristics of the suicide attempter according to the onset time of the suicidal ideation

Factor Entire population N = 2274 Time from development of suicidal ideation to suicide attempt P value Multiple comparison and residual analysis Analytical method Unknown N = 544
Same day N = 1358 Short-term (2–7 days) N = 492 Long-term (>7 days) N = 424
Male
 N 657 308 188 161 <.001 Shaded area Chi-square 191
 % 28.9 22.7 38.2 38.0 35.1
Age
 Mean 36.73 34.68 38.36 41.43 <.001 Significant difference among 3 groups Analysis of variance 40.53
 SD 16.29 15.11 16.62 18.27 17.46
Presentation to tertiary services
 N 1421 802 331 288 <.001 Shaded area Chi-square 405
 % 62.5 59.1 67.3 67.9 74.4
First-time presentation
 N 1181 629 279 273 <.001 Shaded area   297
 % 51.9 46.3 56.7 64.4 54.6
Psychiatric diagnosis
 F0
  N 47 29 12 6 .533    17
  % 2.1 2.1 2.4 1.4     3.1
 F1
  N 68 49 9 10 .097    12
  % 3.0 3.6 1.8 2.4     2.2
 F2
  N 310 186 70 54 .802    71
  % 13.6 13.7 14.2 12.7     13.1
 F3
  N 837 400 210 227 <.001 Shaded area   235
  % 36.8 29.5 42.7 53.5     43.2
 F4
  N 696 470 132 94 <.001 Shaded area   110
  % 30.6 34.6 26.8 22.2     20.2
 F6
  N 199 145 39 15 <.001 Shaded area   33
  % 8.8 10.7 7.9 3.5     6.1
 Other
 N 117 79 20 18 .208    67
 % 5.1 5.8 4.1 4.2     12.3
Prior history of suicide attempt
 During the past year
  N 919 611 152 156 <.001 Shaded area   163
  % 40.4 45.0 30.9 36.8     30.0
 During lifetime
  N 1297 848 239 210 <.001 Shaded area   245
  % 57.0 62.4 48.6 49.5     45.0
No consultation prior to suicide attempt
 N 1453 942 297 214 <.001 Shaded area   
 % 63.9 69.4 60.4 50.5     
Currently receiving outpatient psychiatric treatment
 N 1411 907 273 231 <.001 Shaded area   
 % 62.0 66.8 55.5 54.5     
Means of suicide attempt
 Drug
  N 1221 796 260 165 <.001 Shaded area   276
  % 53.7 58.6 52.8 38.9     50.7
 Poisoning
  N 137 65 34 38 .004 Shaded area   32
  % 6.0 4.8 6.9 9.0     5.9
 Inhaling gas
  N 77 27 26 24 <.001 Shaded area   34
  % 3.4 2.0 5.3 5.7     6.2
 Jumping from a tall building
  N 90 49 16 25 .072    32
  % 4.0 3.6 3.3 5.9     5.9
 Jumping in front of a train
  N 9 6 1 2 .742    1
  % .4 .4 .2 .5     .2
 Knife
  N 399 233 82 84 .385    61
  % 17.5 17.2 16.7 19.8     11.2
 Self-burning
 N 22 10 7 5 .364    19
 % 1.0 .7 1.4 1.2     3.5
 Drowning oneself
  N 29 16 4 9 .187    5
  % 1.3 1.2 .8 2.1     .9
 Hanging
  N 104 49 19 36 <.001 Shaded area   46
  % 4.6 3.6 3.9 8.5     8.5
 Combination
  N 154 88 38 28 .635    28
  % 6.8 6.5 7.7 6.6     5.1
 Other
  N 18 10 4 4 .914    2
% .8 .7 .8 .9     .4
Motives for suicide
 Family problem
  N 502 336 102 64 <.001 Shaded area   108
  % 22.1 24.7 20.7 15.1     19.9
 Economic difficulties
  N 119 47 40 32 <.001 Shaded area   24
  % 5.2 3.5 8.1 7.5     4.4
 Pain of sickness
  N 243 112 60 71 <.001 Shaded area   69
  % 10.7 8.2 12.2 16.7     12.7
 Hallucinations/Delusion
  N 157 82 37 38 .097    17
  % 6.9 6.0 7.5 9.0     3.1
 Work problem
  N 194 98 54 42 .020 Shaded area   34
  % 8.5 7.2 11.0 9.9     6.2
 Inter-personal relationship
  N 391 257 87 47 .001 Shaded area   60
  % 17.2 18.9 17.7 11.1     11.0
 School problem
  N 24 15 3 6 .474    2
  % 1.1 1.1 .6 1.4     .4
 Other
  N 84 64 13 7 .005 Shaded area   12
  % 3.7 4.7 2.6 1.7     2.2
 Combination
  N 431 247 86 98 .050    97
  % 19.0 18.2 17.5 23.1     17.8
 Unknown
  N 129 100 10 19 <.001 Shaded area   121
  % 5.7 7.4 2.0 4.5     12.2
Living with someone
 N 1826 1073 400 353 .154    420
 % 80.3 79.0 81.3 83.3     77.2
Years of schooling
 Mean 11.70 11.69 11.78 11.64 .663   Analysis of variance 11.63
 SD 2.35 2.19 2.39 2.75    2.25
Being at work
 N 786 458 177 151 .110    163
 % 34.6 33.7 36.0 35.6     30.0
JCS
 Mean 211.41 196.85 228.89 236.80 .104   Kruskal–Wallis 103.85
 SD 373.87 362.48 386.16 392.83    128.43
AD (Asukai classification)
 N 313 129 79 105 <.001 Shaded area Chi-square 120
 % 13.8 9.5 16.1 24.8    22.1
BPRS
 Mean 18.60 17.84 19.10 20.52 <.001 Significant difference between the same-day group and the other groups Analysis of variance 12.36
 SD 11.59 11.44 10.96 12.56    9.80
GAS
 Mean 34.74 37.16 32.99 29.08 <.001 Significant difference among 3 groups   24.81
 SD 19.26 19.80 17.77 17.78     18.55
LCU
 Mean 41.70 31.852 29.225 39.378 <.001 Significant difference among 3 groups Kruskal–Wallis 52.84
 SD 33.40 .981 1.476 2.056    37.24
Outcome
 Discharged home
  N 670 471 101 98 <.001 Shaded area   114
  % 30.2 35.3 21.0 24.3    22.2
 Admitted to emergency care center
  N 592 322 147 123 .004 Shaded area Chi-square 153
  % 26.7 24.1 30.6 30.4    29.8
 Admitted to psychiatric department
  N 937 532 225 180 .016 Shaded area   230
  % 42.2 39.9 46.9 44.6     44.8
 Suicide
  N 36 16 6 14 .007 Shaded area   52
  % 1.6 1.2 1.2 3.3     9.6