Table 1 Characteristics of the cohort and cases of first-time self-harm (N = 165,932)
Characteristic | Distribution of the cohort | Incidence of first-time self-harm per 100,000 person-years | ||
|---|---|---|---|---|
N (%) | All | Boys | Girls | |
Total | 165,932 (100) | 400 | – | – |
Gender | ||||
Boys | 85,182 (51.3) | 143 | – | – |
Girls | 80,750 (48.7) | 675 | – | – |
Parental education | ||||
Primary | 15,829 (9.5) | 469 | 159 | 796 |
Secondary | 69,564 (41.9) | 453 | 154 | 773 |
Tertiary | 80,539 (48.6) | 341 | 131 | 567 |
Household income | ||||
1st quintile (Lowest) | 32,659 (19.7) | 381 | 123 | 658 |
2nd quintile | 33,239 (20.0) | 459 | 145 | 795 |
3rd quintile | 33,356 (20.1) | 442 | 176 | 727 |
4th quintile | 33,344 (20.1) | 383 | 157 | 628 |
5th quintile (highest) | 33,334 (20.1) | 335 | 116 | 567 |
Receipt of welfare | ||||
No | 15,606 (93.8) | 394 | 142 | 664 |
Yes | 10,326 (6.2) | 486 | 166 | 837 |
Parental country of birth | ||||
Sweden | 107,470 (64.8) | 400 | 140 | 676 |
Mixed | 21,790 (13.1) | 505 | 184 | 852 |
Outside Sweden | 36,672 (22.1) | 339 | 130 | 565 |
Number of parents in the household | ||||
One | 49,256 (29.7) | 567 | 207 | 951 |
Two | 116,676 (70.3) | 331 | 117 | 559 |
History of mental disorder of biological parent | ||||
No | 148,718 (89.6) | 365 | 132 | 615 |
Yes | 17,214 (10.4) | 705 | 244 | 1206 |