What age can depression start
Pro Research Analysisby 
Searched over 200M research papers
Age of Onset for Depression: Key Insights from Research
Early Childhood Depression: Onset as Young as Age 3
Research indicates that depression can begin at a very young age. A longitudinal study examining predictors of depression in children aged 3 to 6 found that several factors, including child temperament, parental psychopathology, and family stressors, can predict the onset of depression by age 6 . This suggests that even very young children are susceptible to developing depressive disorders under certain conditions.
Childhood to Adolescence: Increasing Rates and Gender Differences
Depression rates increase significantly from childhood into adolescence. The Gene Environment Mood (GEM) study, which followed youth from ages 8 to 18, found that depression rates rise notably in middle to late adolescence, particularly post-puberty. The study also highlighted that girls are more likely to develop depression than boys, with this gender difference emerging around age 12.5 . Another study corroborated these findings, noting that the most significant increase in depression rates and gender differences occurs between ages 15 and 18 .
Adolescence: A Critical Period
Adolescence is a critical period for the onset of depression. Multiple studies have shown that the peak increase in depression rates occurs during middle to late adolescence (ages 15-18) 13. This period is marked by significant developmental changes and increased vulnerability to stress, which can contribute to the onset of depressive episodes.
Early Adulthood: Continued Vulnerability
The risk of developing depression continues into early adulthood. A study examining the age of onset for depressive disorders found that over half of individuals with major depressive disorder reported onset by age 25 . This indicates that while adolescence is a high-risk period, early adulthood remains a critical time for the emergence of depression.
Late Adulthood: Increased Risk Due to Health Decline
Depression rates can rise again in late adulthood, particularly among those aged 80 and older. This increase is often associated with physical dysfunction, loss of personal control, and other age-related challenges 28. However, it is important to note that healthy, normally functioning older adults are not at a greater risk for depression than younger adults; the apparent age-related effects are largely due to chronic health problems and related disabilities .
Conclusion
Depression can begin at any age, from early childhood through late adulthood. The onset of depression in young children is influenced by various factors, including temperament and family environment. Adolescence is a particularly vulnerable period, with significant increases in depression rates and gender differences. Early adulthood continues to be a critical time for the onset of depression, while late adulthood sees increased rates primarily due to health-related issues. Understanding these patterns can help in developing targeted interventions to address depression at different life stages.
Sources and full results
Most relevant research papers on this topic
Development of depression from preadolescence to young adulthood: emerging gender differences in a 10-year longitudinal study.
The greatest increase in gender differences in depression occurs between ages 15 and 18, with higher rates and greater risk for depression onset during this period.
The diagnosis of depression: current and emerging methods.
Traditional interview tools and laboratory methods can accurately diagnose depression, while newer methods like genomics, proteomics, and metabolomics show promise but require further evaluation for clinical value and accuracy.
Does growing old increase the risk for depression?
Healthy, normally functioning older adults are not at greater risk for depression than younger adults, with age-related effects mainly attributed to physical health problems and related disability.
Depression in late life: age of onset as marker of a subtype.
Late-onset elderly depression may not be a distinct pathological process, as it does not show a clear relationship with psychosis, melancholia, medical illness, symptom severity at admission, or neuropathology.
Age at Onset or Late-Life Depression: A Research Agenda Report of a MacArthur Foundation-NIMH Workshop.
The workshop on age-at-onset research in late-life depression identified methodological and conceptual issues and recommended future investigation.
DOI