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Table 3 Comparison between Suicide Attempters and Non-Suicide Attempters Based on Risk and Protective Measures

From: Psychological characteristics of suicide attempters among undergraduate college students in China: a cross-sectional study

Factors

Suicide Attempt

Total

Statistic

p-value

Cohen’s d

Yes (n = 237)

No (n = 1185)

(n = 1422)

Risk Measures

 Hopelessness

  • Mean ± SD

55.0 ± 8.4

50.4 ± 9.4

51.1 ± 9.4

7.54

< 0.001a

9.21

  • Median (min, max)

56 (32, 79)

50 (27, 91)

51 (27, 91)

170,489.00

< 0.001b

0.28c

 Psychache

  • Mean ± SD

33.7 ± 12.2

23.7 ± 9.9

25.4 ± 11.0

11.80

< 0.001a

10.31

  • Median (min, max)

32 (13, 65)

22 (13, 65)

23 (13, 65)

203,121.00

< 0.001b

0.60c

 Depression

  • Mean ± SD

8.8 ± 5.3

4.7 ± 4.3

5.4 ± 4.7

11.17

< 0.001a

4.45

  • Median (min, max)

9 (0, 21)

4 (0, 21)

4 (0, 21)

200,905.00

< 0.001b

0.58c

Protective Measures

 Social Support

  • Mean ± SD

56.7 ± 13.2

62.1 ± 11.8

61.2 ± 12.2

5.83

< 0.001a

12.07

  • Median (min, max)

57 (15, 84)

62 (12, 84)

61 (12, 84)

101,720.00

< 0.001b

0.36c

 Self Esteem

  • Mean ± SD

25.4 ± 3.9

27.3 ± 3.7

27.0 ± 3.8

6.87

< 0.001a

3.70

  • Median (min, max)

25 (12, 37)

27 (14, 37)

26 (12, 37)

97,582.00

< 0.001b

0.40c

 Purpose in Life

  • Mean ± SD

18.2 ± 5.1

20.4 ± 4.6

20.0 ± 4.8

6.72

< 0.001a

4.69

  • Median (min, max)

19 (4, 28)

21 (4, 28)

20 (4, 28)

97,632.50

< 0.001b

0.40c

  1. 1. Suicide Attempters group scored significantly higher (p < 0.001) for all three risk factors measurements of hopelessness, psychache, and depression. Size effects using Cohen’s d is small for hopelessness, and large for psychache and depression
  2. 2. For three protective factors tested, Suicide Attempters group scored significantly lower (p < 0.001) for social support, self-esteem and purpose in life. Size effects using Cohen’s d is small for social support and self-esteem, while it has medium size effects for purpose in life
  3. 3. aIndependent samples t-test; bMann-Whitney U test
  4. 4. ccalculation obtained from https://www.psychometrica.de/effect_size.html
  5. Ref: Cohen (1992), .00 to .19 as trivial; values .20 to .49 as small effect, values .50 to .79 as medium effect, and values ≥ .80 as a large effect.