Study Examines the Relationship Between Parental Divorce and Adult Depression

A recent study suggests that the connection between parental divorce in childhood and a heightened risk of depression in adulthood is largely influenced by the mental health and substance use issues of the parents, rather than the divorce itself. Researchers analyzed data from over 128,000 adults and found that when accounting for parental mental illness, the statistical association between family structure and adult emotional distress substantially diminishes. The findings were published in Psychiatry Research.

Previous investigations, including a 2019 meta-analysis, indicated that adults who experienced parental divorce in childhood often report higher incidences of depression and psychological distress. This led to the assumption that divorce itself inflicts lasting emotional damage. However, family dynamics are complex, and a marital split often coexists with other adversities in a child's life.

For instance, a 2024 study pointed out that adults who experienced divorce may have underlying mental health vulnerabilities, prompting the question of whether shared family issues contribute to both marital breakdown and subsequent struggles faced by children. Earlier research has also linked parental divorce to long-term health consequences, such as the increased risk of stroke in later life, as reported by PsyPost in 2025.

Led by Mary Kate Schilke from Tyndale University and Esme Fuller-Thomson from the University of Toronto, the study aimed to determine if the perceived impact of parental divorce holds true when considering other negative childhood experiences. Additionally, the research focused on a growing but less-explored group: adults with parents who never married.

To conduct their analysis, the authors utilized data from the 2021-2024 Behavioral Risk Factor Surveillance System, a large telephone survey that gathers health information from adults in the United States. They examined a sample of 128,264 participants, excluding those who reported experiencing physical or sexual abuse during childhood to focus on family structure effects rather than severe trauma.

Respondents provided information about their parents' marital status before their 18th birthday, categorized as continuously married, divorced, or never married. The study assessed mental health through two main measures: self-reported lifetime depression diagnoses and instances of frequent mental distress, defined as experiencing 14 or more days of poor mental health in the previous month.

Initially, the researchers identified a significant difference in mental health outcomes based on family structure. Adults from divorced households reported a lifetime depression rate of 19.2%, while those with unmarried parents had a rate of 18.7%. In contrast, individuals from continuously married families showed a rate of 14.1%. A similar trend emerged for frequent mental distress, with rates of 13.6% for those with divorced parents, 16.3% for those with unmarried parents, and 8.5% for those whose parents remained married.

However, once the researchers adjusted their statistical models to include other adverse childhood experiences—such as neglect, domestic violence, emotional abuse, and parental incarceration—the relationship between parental divorce and adult depression was impacted. Parental mental illness and substance use were particularly influential. Accounting for parental mental illness reduced the association between parental divorce and adult depression by 68%, while acknowledging parental substance use led to a 49% reduction.

After considering all childhood adversities, sociodemographic factors, and adult health behaviors, the connection between childhood family structure and adult mental health ceased to be statistically significant, indicating that divorce is not a primary cause of later mental health issues. Instead, it appears that various environmental and genetic factors accompanying a divorce or unmarried household contribute to the increased risk.

It is important to note that this study relies on self-reported data, which may introduce inaccuracies regarding childhood memories. Moreover, the cross-sectional design does not allow researchers to establish a timeline of events, such as the onset of a parent's mental illness in relation to the divorce. Additionally, the category for unmarried parents is broad, encompassing both single parents and couples who cohabited without marriage, which may represent differing family environments. The survey recorded respondents' socioeconomic status in adulthood but did not account for it during childhood, potentially omitting crucial context about financial circumstances during the divorce.

The study, titled “Long After the Split: The Association Between Parental Divorce and Mental Health in Adults,” was authored by Mary Kate Schilke, Philip Baiden, and Esme Fuller-Thomson.