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Table 1 Baseline characteristics of suicide death cases

From: The short-term effect of ambient particulate matter on suicide death

Variables

N (%)

N = 28,670

Region

 

 Seoul

9,923 (34.6)

 Gyeonggi

14,986 (52.3)

 Incheon

3,761 (13.1)

Sex (male)

19,732 (68.8)

Age

51.8 ± 17.8

 Under 19 years

456 (1.6)

 19–40 years

7,769 (27.1)

 41–64 years

13,158 (45.9)

 Over 65 years

7,287 (25.4)

Suicide method

 

 Violent method

21,970 (76.7)

 Hanging

15,725 (54.9)

 Drowning

637 (2.2)

 Cutting and piercing

376 (1.3)

 Jumping in front of a car or train

86 (0.3)

 Others

106 (0.4)

Non-violent method

6,679 (23.3)

 Drug poisoning

2,207 (7.7)

 Gas poisoning and suffocation

4,472 (15.6)

Suicide cause, N = 27,585

 

 Occupational problems

1,322 (4.6)

 Economic problems

6,007 (21.0)

 Family problems

3,039 (10.6)

 Interpersonal problems

1,404 (4.9)

 Physical health problems

4,605 (16.1)

 Mental health problems

10,548 (36.8)

 Other causes

660 (2.3)

Suicide note (Presence)†, N = 26,336

11,150 (42.3)

Physical disease (With)†, N = 20,582

10,921 (53.1)

Psychiatric disorder (With)†, N = 16,461

8,780 (53.3)

Warning signal (language)†, N = 22,959

20,298 (88.4)

Warning signal (behavior)†, N = 20,521

15,372 (74.9)

Warning signal (emotion)†, N = 21,326

18,900 (88.6)

  1. *Data are presented as number (percentage) or mean ± standard deviation
  2. †These variables had missing values; N indicates the number of subjects included in the analysis