Predicting ADHD in alcohol dependence using polygenic risk scores for ADHD
Kejal H. S. Patel, G. Bragi Walters, Hreinn Stefánsson, Kári Stefánsson, Franziska Degenhardt, Markus Nothen, Tracey Van Der Veen, Ditte Demontis, Anders Borglum … See all authors
This study looked at whether the same genetic factors that increase the likelihood of ADHD also increase the likelihood of alcohol dependence.
Researchers used something called a polygenic risk score for ADHD. This is not a diagnosis. It is a statistical estimate that reflects how many small genetic markers associated with ADHD a person has.
They found that people with both ADHD and alcohol dependence had higher ADHD genetic risk scores than people with alcohol dependence alone, and higher than people without either condition. This suggests that ADHD and alcohol dependence may share some underlying genetic vulnerability.
The study also found elevated ADHD genetic risk in some alcohol-dependent people who had never been diagnosed with ADHD, compared to people without alcohol dependence. This suggests that ADHD traits may be missed, masked, or unrecognized in adulthood, which is especially relevant for women.
The genetic link showed up more clearly in men than in women in this study. The authors were careful to note that this may be because women were underrepresented in the sample, not because the link does not exist in women.
The researchers emphasized that genetic risk scores are not ready for clinical use. They cannot predict individual outcomes and should not be used to label or screen people. Larger and more diverse studies are needed.
What this means
ADHD and alcohol dependence may overlap partly because of shared biology, not just behavior or coping choices.
Having ADHD does not cause alcohol problems, and alcohol problems do not mean someone has ADHD.
Genetics increase vulnerability, not destiny.
Environment, support, stress, masking, hormones, and access to care still matter deeply.
Why this matters for ADHD women
This research helps explain why some ADHD women notice that alcohol feels unusually regulating or unusually destabilizing compared to others.
It supports the idea that substance use in ADHD is not about recklessness or weak boundaries, but about how certain nervous systems respond to stimulation, relief, and recovery.
The findings also suggest that shared genetic vulnerability may shape how reinforcing or calming alcohol feels, rather than reflecting impulsivity or poor judgment.
It cautions against simplistic explanations. Genetics may increase sensitivity, but lived experience determines how that sensitivity plays out. For ADHD women, this includes late diagnosis, chronic masking, hormonal shifts, caregiving roles, and high social expectations.
Most importantly, the study reinforces that risk is not blame. Shared genetic vulnerability helps explain patterns without reducing people to them.
Core takeaways
ADHD and alcohol dependence may share some genetic vulnerability.
This overlap reflects sensitivity, not inevitability.
Genetics influence risk, not outcomes.
Some alcohol-dependent adults may carry ADHD genetic risk even without an ADHD diagnosis, pointing to missed or masked ADHD.
Women were underrepresented, so findings should not be overgeneralized.
This research explains patterns; it does not justify labeling or prediction.