A University of Glasgow study tracking over 120,000 women has found that girls with ADHD from deprived backgrounds face more than double the risk of developing multiple long-term health conditions in adulthood—a gap that underscores how invisible ADHD has been in girls' healthcare and how poverty compounds that invisibility.
The research, published in Nature Mental Health, reveals a pattern that has been largely overlooked: while ADHD in girls has been historically underrecognized, underdiagnosed, and undertreated, the long-term health consequences of missing or delaying these diagnoses prove especially severe for young women navigating both ADHD and economic hardship. Women aged 18 to 32 with both childhood ADHD and socioeconomic deprivation were more than twice as likely to experience multimorbidity—the presence of two or more long-term health conditions—compared to those without ADHD.
What makes this finding particularly striking is not just the elevated risk, but the type of health complications that emerge. The researchers identified distinct clustering patterns, with the most severe cases characterized by what they call "pan-system multimorbidity"—a complex constellation of both physical conditions and serious mental health issues, including post-traumatic stress disorder and borderline personality disorder. In contrast, women without ADHD who did develop multiple health conditions were far more likely to experience patterns limited to physical health alone. This distinction matters enormously for how healthcare systems should respond: treating ADHD in girls from disadvantaged backgrounds requires an integrated approach that recognizes mental and physical health as inseparable.
Dr. Naomi Wilson, from the University's School of Health and Wellbeing, emphasized the urgency. "Our findings suggest that a combination of both ADHD and socioeconomic deprivation can amplify long-term health risks, highlighting that girls with ADHD from disadvantaged backgrounds should be considered a high-risk group that require earlier, integrated care," she said. The research shows that for women with ADHD, multimorbidity often involves complex patterns of mental health need that current service delivery structures may not be equipped to handle.
The implications are clear: the challenge is not simply better diagnosis, though that matters. It is earlier identification paired with targeted interventions that address both clinical symptoms and the social factors—poverty, housing instability, limited healthcare access—that shape whether a girl with ADHD can actually benefit from treatment. A child with ADHD in a wealthy family might receive swift private diagnosis and tailored support; the same child in a deprived area faces delays, fragmented care, and compounding health consequences that reverberate into adulthood.
This research holds up a mirror to healthcare systems that have long missed girls with ADHD entirely. As Dr. Wilson notes, the findings underscore "the need for earlier identification of ADHD in girls, with targeted interventions that address both clinical and social factors to improve the long-term health outcomes for this group." Recognizing ADHD in girls has always been a matter of fairness. This study shows it is also a matter of preventing a cascade of preventable health complications that will affect these women for decades to come.