Table 1. Definitions and Classification of Childhood Adversity.
| Childhood Adversity | Definition | ICD Classification | Data Source |
|---|---|---|---|
| Parental death | Parental death | NA | Causes of Death Register |
| Parental suicide | Parental suicide |
ICD-9: 950-59, 980-89; ICD-10: X60-84, Y10-34 |
Causes of Death Register |
| Parental substance abuse | At least 1 hospitalization for alcohol and/or narcotic-related substance abuse |
ICD-9: 291, 303, 304.0-304.9, 305.0, 305.2-305.7, 305.9; ICD-10: F10-F19 |
National Patient Register |
| Substantial parental criminal offending | At least 1 parent sentenced to prison, probation, or forensic psychiatric care | NA | Register of Court Convictions |
| Parental psychiatric disorder | At least 1 hospitalization for psychiatric disorder (excluding substance abuse–related disorders) | ICD-9: 290-319; ICD-10: F00-F99 | National Patient Register |
| Parental separation | Having separated parents | NA | Longitudinal Integration Database for Health Insurance and Labor Market Studies |
| Household living on public assistance | Public assistance during at least 1 y, when >50% of the yearly income constituted public assistance | NA | Total Enumeration Income Survey |
| Substantial child welfare intervention | At least 1 placement in out-of-home care before age 12 y | NA | Child Welfare Register |
| Residential instability | ≥3 Changes in place of residence | NA | Total Population Register |
Abbreviations: ICD-9, International Classification of Diseases, Ninth Revision; ICD-10, International Statistical Classification of Diseases and Related Health Problems, Tenth Revision; NA, not applicable.