Table 2. Characteristics of high-risk suicide (n = 7,443) and no high-risk suicide (n = 52,541).
| no high-risk suicide (n = 52,541) | high-risk suicide (n = 7,443) | P value* | |
|---|---|---|---|
| Sex, boy | 27493 (52.3%) | 2891 (38.8%) | <0.001 |
| Age (yrs.) | 15.0±1.7 | 15.0±1.8 | 0.695 |
| School | <0.001 | ||
| Middle school | 25876 (49.2%) | 3869 (52.0%) | |
| High school | 26665 (50.8%) | 3574 (48.0%) | |
| School grade | <0.001 | ||
| G1 | 8800 (16.7%) | 1039 (14.0%) | |
| G2 | 8520 (16.2%) | 1435 (19.3%) | |
| G3 | 8556 (16.3%) | 1395 (18.7%) | |
| G4 | 8760 (16.7%) | 1057 (14.2%) | |
| G5 | 9071 (17.3%) | 1327 (17.8%) | |
| G6 | 8834 (16.8%) | 1190 (16.0%) | |
| City type | 0.654 | ||
| countryside | 4094 (7.8%) | 563 (7.6%) | |
| small/medium-sized cities | 25154 (47.9%) | 3545 (47.6%) | |
| big cities | 23293 (44.3%) | 3335 (44.8%) | |
| Academic achievement | <0.001 | ||
| high | 7221 (13.7%) | 878 (11.8%) | |
| high middle | 13830 (26.3%) | 1632 (21.9%) | |
| middle | 15286 (29.1%) | 1926 (25.9%) | |
| low middle | 11439 (21.8%) | 1922 (25.8%) | |
| low | 4765 (9.1%) | 1085 (14.6%) | |
| Family structure | <0.001 | ||
| live with both parents | 43647 (83.1%) | 5740 (77.1%) | |
| live with one parent | 4955 (9.4%) | 938 (12.6%) | |
| neither parent | 3939 (7.5%) | 765 (10.3%) | |
| Family SES | <0.001 | ||
| high | 5663 (10.8%) | 700 (9.4%) | |
| high middle | 15518 (29.5%) | 1987 (26.7%) | |
| middle | 24500 (46.6%) | 3103 (41.7%) | |
| low middle | 5790 (11.0%) | 1260 (16.9%) | |
| low | 1070 (2.0%) | 393 (5.3%) | |
| Education, father | <0.001 | ||
| unknown | 11405 (21.7%) | 1614 (21.7%) | |
| middle school graduate or less | 932 (1.8%) | 190 (2.6%) | |
| high school graduate | 13488 (25.7%) | 1902 (25.6%) | |
| college or graduate degree | 26716 (50.8%) | 3737 (50.2%) | |
| Education, mother | <0.001 | ||
| unknown | 10695 (20.4%) | 1515 (20.4%) | |
| middle school graduate or less | 779 (1.5%) | 175 (2.4%) | |
| high school graduate | 16530 (31.5%) | 2254 (30.3%) | |
| college or graduate degree | 24537 (46.7%) | 3499 (47.0%) | |
| Current smoking (yes) | 2748 (5.2%) | 753 (10.1%) | <0.001 |
| Current alcohol drinking (yes) | 7474 (14.2%) | 1659 (22.3%) | <0.001 |
| Substance use (yes) | 303 (0.6%) | 196 (2.6%) | <0.001 |
| Physical activity | <0.001 | ||
| active | 20243 (38.5%) | 2689 (36.1%) | |
| inactive | 32298 (61.5%) | 4754 (63.9%) | |
| Body mass index (kg/m2) | 21.1±3.4 | 21.2±3.4 | 0.033 |
| Obesity | 0.228 | ||
| underweight | 4088 (7.8%) | 621 (8.3%) | |
| normal | 39827 (75.8%) | 5648 (75.9%) | |
| overweight | 1326 (2.5%) | 178 (2.4%) | |
| obesity | 7300 (13.9%) | 996 (13.4%) | |
| Sexual experience (yes) | 2128 (4.1%) | 616 (8.3%) | <0.001 |
| Internet addiction (yes) | 1766 (3.4%) | 563 (7.6%) | <0.001 |
| Sadness (yes) | 9548 (18.2%) | 5389 (72.4%) | <0.001 |
| Stress | <0.001 | ||
| very high | 3648 (6.9%) | 2545 (34.2%) | |
| high | 13050 (24.8%) | 3086 (41.5%) | |
| middle | 23913 (45.5%) | 1507 (20.2%) | |
| low | 9621 (18.3%) | 227 (3.0%) | |
| very low | 2309 (4.4%) | 78 (1.0%) | |
| Self-rated health | <0.001 | ||
| very good | 15525 (29.5%) | 1204 (16.2%) | |
| good | 23892 (45.5%) | 2695 (36.2%) | |
| normal | 10561 (20.1%) | 2336 (31.4%) | |
| poor | 2438 (4.6%) | 1081 (14.5%) | |
| very poor | 125 (0.2%) | 127 (1.7%) | |
| Sleep satisfaction | <0.001 | ||
| very high | 4570 (8.7%) | 323 (4.3%) | |
| high | 9869 (18.8%) | 755 (10.1%) | |
| middle | 17375 (33.1%) | 1975 (26.5%) | |
| low | 14392 (27.4%) | 2428 (32.6%) | |
| very low | 6335 (12.1%) | 1962 (26.4%) | |
| Self-rated weight | <0.001 | ||
| very thin | 2144 (4.1%) | 351 (4.7%) | |
| thin | 11176 (21.3%) | 1409 (18.9%) | |
| normal | 19141 (36.4%) | 2281 (30.6%) | |
| fat | 16914 (32.2%) | 2667 (35.8%) | |
| very fat | 3166 (6.0%) | 735 (9.9%) | |
| Distorted weight perception (yes) | 16701 (31.8%) | 2867 (38.5%) | <0.001 |
| School injury (yes) | 12105 (23.0%) | 2382 (32.0%) | <0.001 |
| Violence (yes) | 893 (1.7%) | 529 (7.1%) | <0.001 |
| Asthma (yes) | 4343 (8.3%) | 827 (11.1%) | <0.001 |
| Allergic rhinitis (yes) | 18073 (34.4%) | 2906 (39.0%) | <0.001 |
| Atopic dermatitis (yes) | 12839 (24.4%) | 2152 (28.9%) | <0.001 |
Note. Values are means ± standard deviation, median (range), or number (percentages).
*Chi-squared test or Student's t test.
SES: socio-economic status