ADHD, OCD, and Panic Disorder: What the Genetic Data Show

ADHD — attention-deficit/hyperactivity disorder — is often linked to procrastination, forgetfulness, difficulty concentrating, or a constant need for new stimulation — traits that are actually familiar to many people. On social media, posts and videos listing such signs get enormous reach, and people often recognize themselves and their own experience in them. In one study, the 100 most popular ADHD videos together racked up nearly half a billion views. Yet fewer than half of the symptom claims in the content studied were accurate and matched the criteria used in the clinical diagnosis of ADHD (Karasavva et al., PLoS One, 2025).

This doesn’t mean that talking about mental health on social media is a problem. But it does show how easily a single common trait can be perceived as a sign of a specific disorder. In another analysis of popular ADHD content, about half of the videos were classified as misleading. In more than a third of the comments analyzed on this content, people related the described behavioral patterns to their own experience (Sieferle et al., JMIR Infodemiology, 2025).

Looking at these conditions from a genetics perspective can invite another tempting simplification: if ADHD and other conditions such as obsessive-compulsive disorder (OCD), panic disorder, or post-traumatic stress disorder (PTSD) have a genetic component, perhaps DNA can predict such a condition in a specific person.

A Diagnosis Is More Than a Symptom Checklist

Difficulty concentrating is part of the clinical picture of ADHD, but on its own it doesn’t establish an ADHD diagnosis. For a diagnostic assessment, clinicians look for a persistent pattern of inattention and/or hyperactivity-impulsivity, several symptoms present before age 12, their presence in two or more settings, and an impact on learning, work, or social functioning. At the same time, similar concentration difficulties can arise from sleep problems, anxiety, depressive states, and other causes (National Institute of Mental Health, 2024).

For more on why the same complaints can have different contexts, see also the article Anxiety, Depression, and Burnout: Is There a Genetic Link?.

Similarly, the habit of checking whether the door is locked several times isn’t enough on its own to talk about OCD. This disorder is characterized by recurring unwanted obsessions (intrusive unwanted thoughts, images, or urges), compulsions (repetitive behaviors or mental rituals), or a combination of both, which take up significant time, cause distress, or noticeably interfere with daily life. So intrusive thoughts or certain rituals or checks, as such, aren’t the same as the obsessions and compulsions seen in OCD (National Institute of Mental Health, 2023).

A panic attack and panic disorder aren’t interchangeable terms either. A panic attack can occur once or several times without turning into a disorder. Panic disorder is characterized by recurrent unexpected panic attacks, after which anxiety about new episodes, or behavior changes driven by fear of recurrence, persist for at least a month (National Institute of Mental Health, 2025).

A clinical diagnosis isn’t defined by a single recognizable sign but by a set of criteria and the context in which symptoms appear. But if ADHD, OCD, and panic disorder have a hereditary component, another question naturally follows: can the same line be drawn using genetic data?

This is where it’s important to separate two things. Clinical assessment determines whether a person’s condition meets diagnostic criteria. Genetic assessment describes hereditary predisposition, but it does not draw a diagnostic line between “disorder present” and “disorder absent.”

How Polygenic Scores Relate to a Clinical Diagnosis

For most complex mental health conditions, there is no single common genetic variant whose presence would mean “the disorder is present” and whose absence would mean it isn’t. Genome-wide association studies (GWAS) show the polygenic architecture of these conditions: predisposition is statistically linked to a large number of genetic variants, each typically with a small effect (Demontis et al., Nature Genetics, 2023; Strom et al., Nature Genetics, 2025).

Polygenic score (PRS) aggregates information across many variants, weighted by effects estimated in research studies, and yields a quantitative measure of genetic predisposition. It is not a clinical threshold: there is no universal PRS value beyond which a mental disorder can be said to “begin.”

A high PRS for a particular psychiatric phenotype does not mean a person has the corresponding diagnosis. A low PRS likewise does not mean the diagnosis is absent. The predictive accuracy and specificity of psychiatric PRS at the individual level remain limited and depend on the specific model and underlying data (Mollon et al., Biological Psychiatry, 2025).

The population the model was built on matters too. The accuracy of polygenic scores can decrease when a person’s genetic ancestry differs from that of the original study participants. That’s why the reference population is part of interpreting a PRS, and a percentile should not be read as an absolute probability of developing the condition (Ding et al., Nature, 2023).

The Role of Genetic Data in Studying ADHD, OCD, and Panic Disorder

The genetic evidence base for ADHD, OCD, and panic disorder is uneven. What matters is not only the scale of a study but also who exactly was included in the sample and what criteria were used to define the phenotype. This determines which associations can be detected and how confidently they can be interpreted.

A GWAS meta-analysis of attention-deficit/hyperactivity disorder that included 38,691 people with ADHD and 186,843 control participants identified 27 independent loci associated with ADHD at genome-wide significance. The authors also identified 76 genes for which the combined evidence supported further functional study. One of them was SORCS3 (sortilin related VPS10 domain containing receptor 3). Signals linked to this gene emerged in analyses of both common and rare variants. This warrants closer study of its possible role in ADHD biology, but it does not make SORCS3 “the ADHD gene,” and it does not allow the disorder to be defined by a single gene or variant (Demontis et al., Nature Genetics, 2023).

Importantly, such an association does not describe a mechanism. GWAS helps identify genomic regions and genes worth investigating further, but the statistical link itself doesn’t show through which biological pathway a variant is connected to the phenotype.

Much more data has emerged for OCD in recent years. One of the largest GWAS meta-analyses of obsessive-compulsive disorder to date combined 53,660 cases and more than 2 million control participants and identified 30 independent loci. An important detail: across different datasets, OCD was defined via clinical diagnosis, medical records, biobank data, or self-report. The way the phenotype was defined affected the results, though moderate to high genetic correlation was preserved between subgroups (Strom et al., Nature Genetics, 2025).

For panic disorder, the scientific evidence base on genetic influence is currently smaller. In a GWAS of panic disorder that included 2,248 clinically characterized cases and 7,992 control participants, no locus reached genome-wide significance. At the same time, the analysis found a cumulative contribution from common genetic variants and genetic correlations with depression, depressive symptoms, and neuroticism (Forstner et al., Molecular Psychiatry, 2021).

So the number of loci identified shouldn’t be read as a ranking of how “genetic” a disorder is. The result is shaped by sample size, how the phenotype was defined, statistical power, and the size of effects a study is able to detect.

For more on why neurotransmitter system function shouldn’t be reduced to simple formulas like “ADHD = dopamine deficiency,” see the article Serotonin and Dopamine: What Really Happens in the Brain.

PTSD and Genetics: The Role of Traumatic Experience

PTSD has a defining feature: its development is tied to experiencing or witnessing a traumatic event. After such an experience, anxiety, sleep disturbances, difficulty concentrating, or intrusive memories can occur in many people, but in most, these reactions fade over time. PTSD is diagnosed when a characteristic cluster of symptoms persists for more than a month and noticeably affects everyday functioning (National Institute of Mental Health, 2023).

That’s why a genetic predisposition to PTSD cannot be interpreted separately from traumatic experience. Genetic variants may be statistically linked to differences in PTSD susceptibility, but the genetic profile itself does not describe the event a person lived through, nor does it determine whether the disorder will develop in that person.

A large-scale GWAS meta-analysis involving people of diverse genetic ancestry analyzed data from more than 1.28 million participants, including 150,760 PTSD cases. The researchers identified 95 loci associated with PTSD at genome-wide significance, and subsequent comprehensive functional analysis helped identify 43 genes for which the combined evidence pointed to potential involvement in PTSD susceptibility (Nievergelt et al., Nature Genetics, 2024).

At the population level, such data help describe the genetic architecture of PTSD more precisely. But they don’t make it possible to predict whether a disorder will develop in a specific person after a specific traumatic event. That depends on the characteristics of the experience itself, prior traumatic events, social support, and other biological and psychological factors.

Why Different Mental Disorders Share Genetic Signals

Genetic associations don’t always fit neatly within the boundaries of individual psychiatric diagnoses. Different disorders can share part of their genetic basis, even when their clinical presentations and criteria differ.

In a large-scale analysis of genetic links across 14 mental disorders, researchers pooled data from more than a million cases. The analysis showed substantial genetic overlap between clinically distinct disorders and made it possible to identify five broader genomic factors. On average, these accounted for about two-thirds of the genetic variation in individual disorders (Grotzinger et al., Nature, 2026).

Of course, this doesn’t mean that ADHD, OCD, PTSD, or anxiety disorders are all the same condition. Some common genetic variants may be linked to predisposition toward several different mental disorders. Because of this, a psychiatric PRS should not be treated as a molecular equivalent of a clinical diagnosis.

A genetic signal doesn’t mirror the boundaries of clinical diagnoses: the genetic architecture of these conditions is shaped by the combined contribution of many variants, and their associations can partly overlap across different psychiatric phenotypes. 

What a Genetic Result Actually Means

Higher genetic predisposition without characteristic symptoms does not mean “hidden” ADHD, OCD, or another disorder.

Lower genetic predisposition in the presence of symptoms does not make those symptoms any less real and does not rule out a clinical condition.

Higher predisposition together with symptoms does not confirm a diagnosis. It only adds genetic information to the clinical picture that is already there.

Lower predisposition and the absence of symptoms is not a prediction about the future.

A percentile in a genetic report describes where a result falls relative to a defined reference population. For example, a high percentile means a higher calculated polygenic score compared with most people in that reference group. It does not mean the person has that same percentage probability of receiving a diagnosis.

The Role of Genetic Information in Mental Health Assessment

Genetic information adds data about hereditary predisposition to the clinical picture. It doesn’t replace information about when symptoms started, how they change, in which situations they occur, and how much they affect a person’s life. A professional assessment also takes into account medical and family history, co-occurring conditions, and alternative explanations for the symptoms. 

The Apixmed Prism genetic test, in its Mental Health and Brain domain, evaluates, among other things, indicators for ADHD, OCD, PTSD, panic attacks, and panic disorder. These should be read as additional genetic context, not as confirmation or exclusion of a clinical condition.

Genetic Predisposition Is One Layer of Mental Health Information

ADHD, OCD, panic disorder, and PTSD all have a hereditary component, but genetic predisposition does not reproduce a clinical diagnosis. Psychiatric conditions have a polygenic architecture, some genetic signals are shared across disorders, and the capabilities of polygenic scores depend on the quality of the underlying studies and the reference population.

A genetic result answers the question of what the estimated genetic predisposition is, relative to a reference population, under a specific model. Its value lies in the additional context it provides, not in determining whether a person will have a mental disorder.

Genetic test results are not a diagnosis and not a substitute for a doctor’s consultation. The Apixmed Prism report provides genetic context that complements examination results and helps with decision-making together with a physician.

References

1. Karasavva V., Miller C., Groves N., Montiel A., Canu W., Mikami A.Y. A double-edged hashtag: Evaluation of #ADHD-related TikTok content and its associations with perceptions of ADHD. PLoS One. 2025;20(3):e0319335. DOI: https://doi.org/10.1371/journal.pone.0319335

2. Sieferle K., Guidi T., Dorr F., Bitzer E.M. Quality and Perception of Attention-Deficit/Hyperactivity Disorder Content on TikTok: Cross-Sectional Study. JMIR Infodemiology. 2025;5:e75973. DOI: https://doi.org/10.2196/75973

3. Demontis D., Walters G.B., Athanasiadis G. et al. Genome-wide analyses of ADHD identify 27 risk loci, refine the genetic architecture and implicate several cognitive domains. Nature Genetics. 2023;55:198–208. DOI: https://doi.org/10.1038/s41588-022-01285-8

4. Strom N.I., Gerring Z.F., Galimberti M. et al. Genome-wide analyses identify 30 loci associated with obsessive-compulsive disorder. Nature Genetics. 2025;57:1389–1401. DOI: https://doi.org/10.1038/s41588-025-02189-z

5. Forstner A.J. et al. Genome-wide association study of panic disorder reveals genetic overlap with neuroticism and depression. Molecular Psychiatry. 2021;26:4179–4190. DOI: https://doi.org/10.1038/s41380-019-0590-2

6. Nievergelt C.M., Maihofer A.X., Atkinson E.G. et al. Genome-wide association analyses identify 95 risk loci and provide insights into the neurobiology of post-traumatic stress disorder. Nature Genetics. 2024;56:792–808. DOI: https://doi.org/10.1038/s41588-024-01707-9

7. Grotzinger A.D. et al. Mapping the genetic landscape across 14 psychiatric disorders. Nature. 2026. DOI: https://doi.org/10.1038/s41586-025-09820-3

8. Ding Y. et al. Polygenic scoring accuracy varies across the genetic ancestry continuum. Nature. 2023;618:774–781. DOI: https://doi.org/10.1038/s41586-023-06079-4

9. Mollon J., Schultz L.M., Knowles E.E.M., Jacquemont S., Glahn D.C., Almasy L. Low Stability and Specificity of Polygenic Risk Scores for Major Psychiatric Disorders Limit Their Clinical Utility. Biological Psychiatry. 2025;98(6):476–484. DOI: https://doi.org/10.1016/j.biopsych.2025.03.006 

10. National Institute of Mental Health. Attention-Deficit/Hyperactivity Disorder: What You Need to Know. Revised 2024. https://www.nimh.nih.gov/health/publications/attention-deficit-hyperactivity-disorder-what-you-need-to-know

11. National Institute of Mental Health. Obsessive-Compulsive Disorder: When Unwanted Thoughts or Repetitive Behaviors Take Over. Revised 2023. https://www.nimh.nih.gov/health/publications/obsessive-compulsive-disorder-when-unwanted-thoughts-or-repetitive-behaviors-take-over

12. National Institute of Mental Health. Panic Disorder: What You Need to Know. Revised 2025. https://www.nimh.nih.gov/health/publications/panic-disorder-when-fear-overwhelms

13. National Institute of Mental Health. Post-Traumatic Stress Disorder. Revised 2023. https://www.nimh.nih.gov/health/publications/post-traumatic-stress-disorder-ptsd