Table 1 General characteristics of suicidal behaviors in the study population
Variable | Total sample (n = 18,900) | Suicidal ideation (n = 4982) | Suicidal plan (n = 2493) | Suicidal attempt (n = 983) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
n (%) | χ2 | P | n (%) | χ2 | P | n (%) | χ2 | P | ||
Gender |  |  | 78.90 |  < 0.001 |  | 8.64 | 0.003 |  | 0.46 | 0.496 |
 Male | 8986 (47.5) | 2100 (23.4) |  |  | 1117 (12.4) |  |  | 457 (5.1) |  |  |
 Female | 9914 (52.5) | 2882 (29.1) |  |  | 1376 (13.9) |  |  | 526 (5.3) |  |  |
Residential background |  |  | 36.15 |  < 0.001 |  | 28.90 |  < 0.001 |  | 1.23 | 0.267 |
 Rural | 9401 (49.7) | 2296 (24.4) |  |  | 1115 (11.9) |  |  | 472 (5.0) |  |  |
 Urban | 9499 (50.3) | 2686 (28.3) |  |  | 1378 (14.5) |  |  | 511 (5.4) |  |  |
Any siblings | Â | Â | 0.29 | 0.589 | Â | 0.06 | 0.805 | Â | 2.99 | 0.084 |
 Yes | 10,081 (53.3) | 2641 (26.2) |  |  | 1324 (13.1) |  |  | 498 (4.9) |  |  |
 No | 8819 (46.7) | 2341 (26.5) |  |  | 116 (13.3) |  |  | 485 (5.5) |  |  |
Grade |  |  | 20.58 |  < 0.001 |  | 3.45 | 0.063 |  | 9.65 | 0.002 |
 Junior high school | 10,386 (55.0) | 2601 (25.0) |  |  | 1327 (12.8) |  |  | 493 (4.7) |  |  |
 Senior high school | 8514 (45.0) | 2381 (28.0) |  |  | 1166 (13.7) |  |  | 490 (5.8) |  |  |
Accommodation type |  |  | 15.04 |  < 0.001 |  | 8.35 | 0.004 |  | 1.32 | 0.251 |
 Boarding student | 9566 (50.6) | 2639 (27.6) |  |  | 1329 (13.9) |  |  | 480 (5.0) |  |  |
 Commuting student | 9334 (49.4) | 2343 (25.1) |  |  | 1164 (12.5) |  |  | 503 (5.4) |  |  |
Father’s educational level |  |  | 45.89 |  < 0.001 |  | 61.04 |  < 0.001 |  | 106.31 |  < 0.001 |
  < High school degree | 10,545 (55.8) | 2701 (25.6) |  |  | 1304 (12.4) |  |  | 477 (4.5) |  |  |
  ≥ High school degree | 8136 (43.0) | 2181 (26.8) |  |  | 1124 (13.8) |  |  | 463 (5.7) |  |  |
 No father | 219 (1.2) | 100 (45.7) |  |  | 65 (29.7) |  |  | 43 (19.6) |  |  |
Mother’s educational level |  |  | 19.57 |  < 0.001 |  | 36.60 |  < 0.001 |  | 78.51 |  < 0.001 |
  < High school degree | 11,490 (60.8) | 2948 (25.7) |  |  | 1414 (12.3) |  |  | 564 (4.9) |  |  |
  ≥ High school degree | 7217 (38.2) | 1960 (27.2) |  |  | 1032 (14.3) |  |  | 382 (5.3) |  |  |
 No mother | 193 (1) | 74 (38.3) |  |  | 47 (24.4) |  |  | 37 (19.2) |  |  |
Self-reported family economy |  |  | 181.91 |  < 0.001 |  | 130.75 |  < 0.001 |  | 100.89 |  < 0.001 |
 Bad | 2695 (14.2) | 994 (36.9) |  |  | 535 (19.9) |  |  | 234 (8.7) |  |  |
 General | 13,374 (70.8) | 3257 (24.4) |  |  | 1567 (11.7) |  |  | 566 (4.2) |  |  |
 Good | 2831 (15.0) | 731 (25.8) |  |  | 391 (13.8) |  |  | 183 (6.5) |  |  |
Number of friends |  |  | 227.01 |  < 0.001 |  | 105.97 |  < 0.001 |  | 32.71 |  < 0.001 |
  ≤ 2 | 4630 (24.5) | 1584 (34.2) |  |  | 809 (17.5) |  |  | 314 (6.8) |  |  |
 3–5 | 7719 (40.8) | 1987 (25.7) |  |  | 967 (12.5) |  |  | 345 (4.5) |  |  |
  ≥ 6 | 6551 (34.7) | 1411 (21.5) |  |  | 717 (10.9) |  |  | 324 (4.9) |  |  |
Smoking |  |  | 230.30 |  < 0.001 |  | 401.46 |  < 0.001 |  | 866.89 |  < 0.001 |
 Yes | 579 (3.1) | 311 (53.7) |  |  | 237 (40.9) |  |  | 185 (32.0) |  |  |
 No | 18,321 (96.9) | 4671 (25.5) |  |  | 2256 (12.3) |  |  | 798 (4.4) |  |  |
Being bullied |  |  | 709.48 |  < 0.001 |  | 569.18 |  < 0.001 |  | 343.09 |  < 0.001 |
 Yes | 3891 (20.6) | 1678 (43.1) |  |  | 962 (24.7) |  |  | 431 (11.1) |  |  |
 No | 15,009 (79.4) | 3304 (22.0) |  |  | 1531 (10.2) |  |  | 552 (3.7) |  |  |