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Table 1 Demographic and clinical features, as well as comparison results without adjusting covariates

From: Can cognition help predict suicide risk in patients with major depressive disorder? A machine learning study

Items

DSA* (N = 52)

DNS* (N = 61)

HC* (N = 98)

F/x2

Significant direction

Mean (sd) / N (%)

Mean (sd) / N (%)

Mean (sd) / N (%)

(p-value)

Age

25.54 (8.55)

29.87 (11.50)

29.56 (7.11)

4.160

DSA < DNS、 HC

(0.017)

Gender

Male

12 (23.1%)

25 (41.0%)

49 (50.0%)

10.152

DSA: male < female

Female

40 (76.9%)

36 (59.0%)

49 (50.0%)

(0.006)

Education level

 ≥ 12 years

22 (42.3%)

31 (50.1%)

47 (48.0%)

0.839 (0.657)

 

 < 12 years

30 (57.7%)

30 (49.9%)

51 (52.0%)

 

suicide attempt lethality

High-lethality

9(17.3%)

\

\

\

\

low-lethality

43(82.7%)

Suicide attempt recency

Within one week

9 (17.3%)

\

\

\

\

Not within one week

43 (82.7%)

IGT* performance

 Net total score

-13.73 (28.883)

-16.53 (33.422)

-10.06 (34.148)

0.755(0.471)

 

 PartA(Trails 1–40)

-4.54 (12.221)

-6.27 (13.956)

-9.35 (12.315)

2.666(0.072)

 

 PartB(Trails 41–100)

-9.17 (19.571)

-10.03 (20.881)

-0.735 (25.015)

3.838(0.023)

HC > DSAˎDNS

 Block1(Trials 1–20)

-3 (6.669)

-3.8 (7.269)

-5.27 (6.725)

2.056(0.131)

 

 Block2(Trials 21–40)

-1.54 (7.868)

-2.47 (8.848)

-4.08 (7.896)

1.818(0.165)

 

 Block3(Trials 41–60)

-2.38 (7.118)

-4.07 (9.072)

-1.55 (9.079)

1.583(0.208)

 

 Block4(Trials 61–80)

-3.94 (7.092)

-3.67 (8.471)

-0.51 (9.465)

3.782(0.024)

HC > DSAˎDNS

 Block5(Trials 81–100)

-2.85 (9.712)

-2.34 (9.345)

1.33 (9.877)

4.261(0.015)

HC > DSAˎDNS

SST* performance

 positiveRT

 

726.51(261.209)

690.991(240.908)

\

-0.751(0.454)

 

 negativeRT

 

741.257(256.722)

686.08(246.231)

\

-1.164(0.247)

 

 neutralRT

 

743.001(243.265)

670.407(235.604)

\

-1.608(0.111)

 

 suicideRT

 

756.389(281.243)

698.087(253.441)

\

-1.159(0.249)

 

 "suicide"word RT

 

756.81(361.531)

684.317(297.816)

\

-1.153(0.251)

 

 HAMD-24*

 

36.212(6.241)

29.016(6.828)

\

-5.807(0)

DSA > DNA

 CTQ*score

 

53.94(12.299)

47.33(14.048)

\

-2.640(0.009)

DSA > DNA

  1. *DSA Depressed suicide attempter, DNS Depressed non-suicide attempter, HC Healthy control
  2. IGT IOWA gambling task, SST Suicide stroop task, HAMD-24 Hamilton Depression Scale-24 items, CTQ Childhood Trauma Questionnaire