People diagnosed with obsessive-compulsive disorder do, on average, die younger than the general population. A large Swedish cohort study tracking over six million people found that individuals with OCD had roughly 82% higher all-cause mortality compared to matched controls, and a nationwide Danish study put the figure even higher, at about double the risk. The reasons behind that gap are more layered than most people expect, stretching well beyond the mental health consequences that first come to mind.
What the Nationwide Studies Actually Found
The strongest evidence comes from two Scandinavian population-level studies, both using national health registries that cover entire countries over decades. The Swedish study, published in the BMJ in 2024, followed people with OCD diagnoses and matched them against the general population after adjusting for age, sex, education, income, and other demographic factors. The risk of dying from any cause was 82% higher for people with OCD. When the researchers broke that down, the risk of death from natural causes (things like heart disease and metabolic conditions) was about 31% higher, while the risk of death from unnatural causes (suicide, accidents) was more than three times higher.1BMJ. All cause and cause specific mortality in obsessive-compulsive disorder: nationwide matched cohort and sibling cohort study
A Danish study published in JAMA Psychiatry found similar results in a separate population: after adjusting for sociodemographic variables and somatic health conditions, the all-cause mortality rate ratio for people with OCD was about twice that of the general population.2PubMed Central. Mortality Among Persons With Obsessive-Compulsive Disorder in Denmark The consistency across two different countries, using independent data sets and different statistical methods, makes this finding difficult to dismiss as a quirk of one particular study. Moreover, the elevated mortality risk persisted even after the researchers accounted for other psychiatric conditions like depression and anxiety, which are common alongside OCD. That detail matters because it suggests OCD itself contributes to the mortality gap rather than just acting as a marker for other mental health problems.
Suicide and Accidents Are a Major Part of the Picture
The most dramatic part of the mortality data involves unnatural causes of death. The Swedish study’s finding that unnatural-cause mortality was more than three times higher for people with OCD deserves a close look, because suicide is a significant driver of that number.1BMJ. All cause and cause specific mortality in obsessive-compulsive disorder: nationwide matched cohort and sibling cohort study A systematic review of suicide risk in OCD found that the disorder significantly increases the odds of lifetime suicidal ideation compared to the general population, with odds ratios ranging from about 2 to 10 depending on the study.3PubMed Central. Suicide Risk in Obsessive-Compulsive Disorder and Exploration of Risk Factors: A Systematic Review
A separate meta-analysis pooling data from over 60 studies put concrete numbers on this: roughly one in eight OCD patients had attempted suicide at some point, and nearly half reported lifetime suicidal ideation.4Journal of Affective Disorders. Suicide attempts and suicidal ideation in patients with obsessive-compulsive disorder: A systematic review and meta-analysis Those numbers are strikingly high, and they run counter to a common misconception that OCD is somehow less dangerous than other psychiatric disorders because its symptoms look “less severe” on the surface. The distress caused by relentless intrusive thoughts, compulsive rituals, and the shame that often surrounds them can be profound, even when it is not visible to others.
Accidents also contribute meaningfully to the unnatural-cause mortality risk. People with OCD had a roughly 92% increased risk of dying from accidents, including traffic accidents and falls. This may sound counterintuitive for a disorder often stereotyped as making people hyper-careful, but OCD-related distraction, medication side effects (particularly sedation from some psychiatric drugs), and the sheer mental exhaustion of managing constant compulsions can all plausibly increase accident risk.
The Cardiovascular and Metabolic Toll
While unnatural causes dominate the headlines, the 31% increase in natural-cause mortality is clinically significant too. Cardiovascular disease appears to be a key contributor. A large Swedish population-based study following more than 25,000 individuals with OCD over an average of 27 years found a 25% higher risk of cardiovascular disease overall. The strongest associations were for venous blood clots (48% higher risk) and heart failure (37% higher).5PubMed. Risk of specific cardiovascular diseases in obsessive-compulsive disorder When the researchers compared people with OCD to their own unaffected siblings, the results looked similar, which helps rule out the possibility that shared family environment or genetics alone explain the link.
Metabolic syndrome, a cluster of conditions including abdominal obesity, high blood sugar, and abnormal cholesterol, is also surprisingly common in people with OCD. One study found that about 39% of OCD patients met the criteria for metabolic syndrome, with abdominal obesity present in more than two-thirds and low HDL cholesterol in about half.6PubMed Central. Metabolic syndrome in patients with obsessive-compulsive disorder A broader review of the evidence noted that OCD patients had up to 45% higher risk of obesity, type 2 diabetes, and circulatory diseases compared to both their relatives and the general population, and that this increased risk appeared early in the follow-up period rather than developing only after decades.7Comprehensive Psychiatry. Obsessive-compulsive disorder, insulin signaling and diabetes – A novel form of physical health comorbidity: The sweet compulsive brain
Some of this metabolic burden is likely linked to medications. Certain antipsychotic drugs used to augment OCD treatment are well known to cause weight gain and metabolic disturbances, and one early study found that the presence of metabolic syndrome was specifically associated with lifetime exposure to antidopaminergic drugs.7Comprehensive Psychiatry. Obsessive-compulsive disorder, insulin signaling and diabetes – A novel form of physical health comorbidity: The sweet compulsive brain But medication side effects do not tell the whole story, because elevated metabolic risk persists even after excluding people with various psychiatric comorbidities that might independently drive unhealthy behaviors or prescriptions.
Evidence of Accelerated Biological Aging
Beyond the behavioral and lifestyle pathways, there is growing evidence that OCD may be associated with accelerated aging at the cellular level. Two markers commonly used as proxies for biological aging are telomere length (the protective caps on the ends of chromosomes that shorten as cells age) and mitochondrial DNA copy number (which reflects how well cells produce energy). A study comparing OCD patients to healthy controls found that both men and women with OCD had significantly lower mitochondrial DNA copy number, and women with OCD also had shorter telomeres. The reduction in mitochondrial DNA copy number was correlated with higher systemic inflammation.8PubMed Central. Alterations of cellular aging markers in obsessive–compulsive disorder: mitochondrial DNA copy number and telomere length
A more recent study confirmed the telomere finding across both sexes, reporting that OCD patients had significantly shorter telomeres than controls regardless of gender. Perhaps more telling, telomere length correlated negatively with how long a person had been living with OCD: the longer the illness duration, the shorter the telomeres. In the control group, age alone did not significantly correlate with telomere length over the age range studied, but in OCD patients, it did, suggesting that the disorder accelerates a biological aging process that would otherwise progress more slowly.9Journal of Psychiatric Research. Shorter telomere length in obsessive-compulsive disorder: another evidence of neuroprogression?
Chronic inflammation is one plausible mechanism connecting OCD to both cellular aging and cardiovascular risk. Research has shown that people with OCD have significantly higher levels of inflammation compared to controls, and that these elevated inflammatory markers are associated with changes in brain connectivity patterns linked to symptom severity.10PubMed. The effects of childhood trauma and adult stress on obsessive-compulsive symptoms: the role of inflammation markers and thalamic functional connectivity Chronic low-grade inflammation is well established as a driver of cardiovascular disease, metabolic dysfunction, and cellular aging in other contexts, so it may serve as a common thread tying together several of the physical health consequences seen in OCD.
How Daily Life With OCD Affects Physical Health
The biological mechanisms do not operate in a vacuum. A large international survey of people living with OCD painted a clear picture of how the disorder disrupts the basic health behaviors that protect against chronic disease. Over half of respondents reported low physical activity, and a similar proportion described non-restorative sleep. More than a third reported unhealthy dietary habits, and roughly one in five reported risky alcohol consumption.11PubMed Central. General somatic health and lifestyle habits in individuals with obsessive-compulsive disorder: an international survey
These numbers are not hard to understand once you consider what OCD actually demands from a person’s day. Someone who spends hours on checking rituals, washing compulsions, or mental reviewing has less time and energy for exercise, cooking healthy meals, or maintaining a regular sleep schedule. The cognitive burden alone is exhausting. Add in the social withdrawal that frequently accompanies OCD, and many of the lifestyle factors known to protect cardiovascular and metabolic health erode quietly over time. It is worth noting that these lifestyle disruptions are distinct from the biological mechanisms described above, but they likely compound each other. Poor sleep worsens inflammation, physical inactivity worsens metabolic health, and all of it feeds back into worse mental health outcomes.
Why the Treatment Gap Matters for Mortality
One of the most frustrating aspects of OCD’s mortality risk is that effective treatments exist, yet people often wait years before receiving them. A scoping review of treatment delays found that the gap between when OCD symptoms first appear and when a person receives adequate treatment often exceeds seven years, with some historical estimates putting the delay at over 17 years.12PubMed Central. Factors associated with delays in assessment and treatment of obsessive-compulsive disorder: A scoping review The same review noted that longer untreated illness was associated with greater symptom severity, more comorbid conditions, and worse eventual treatment outcomes.
The telomere research described earlier adds a new dimension to this problem. If illness duration is directly correlated with cellular aging markers, then every year of delayed treatment is not just a year of unnecessary suffering but potentially a year of biological damage. The evidence increasingly points toward OCD as a “neuroprogressive” condition, one that, left untreated, may worsen not just in terms of symptoms but in terms of its physical toll on the body.
Several factors contribute to these delays. OCD is frequently misdiagnosed, partly because its symptoms can mimic other anxiety disorders and partly because patients are often ashamed to disclose the content of their intrusive thoughts. Many clinicians, especially in primary care, are not trained to screen for OCD specifically. Even after diagnosis, access to the gold-standard therapy can be limited by geography, cost, and a shortage of trained therapists.
What Effective Treatment Looks Like
The primary evidence-based therapy for OCD is exposure and response prevention (ERP), a form of cognitive behavioral therapy in which a person is gradually exposed to situations that trigger their obsessions while learning to resist performing compulsions. About half to 60% of patients who complete ERP show clinically significant improvement, and the gains tend to hold over time.13PubMed Central. Exposure and Response Prevention in the Treatment of Obsessive-Compulsive Disorder: Current Perspectives That response rate may sound modest, but it represents substantial reductions in the kind of daily functional impairment that drives poor lifestyle habits, social isolation, and the chronic stress response believed to fuel inflammation.
Newer delivery models are making ERP more accessible. A large retrospective study of video-based teletherapy found that online ERP produced a 43% mean reduction in OCD symptoms, a 63% response rate, and meaningful improvements in depression, anxiety, stress, and quality of life. Response rates were similar whether patients started with mild, moderate, or severe symptoms.14PubMed Central. Online Video Teletherapy Treatment of Obsessive-Compulsive Disorder Using Exposure and Response Prevention: Clinical Outcomes From a Retrospective Longitudinal Observational Study The teletherapy finding is particularly relevant because geographic access is one of the main barriers to treatment: many regions have few or no therapists trained in ERP, and the ability to receive effective treatment over video widens the net considerably.
No study has yet directly demonstrated that treating OCD reduces mortality rates, largely because such a study would require following treated and untreated groups for decades. But the logic connecting treatment to longer life is straightforward. If effective treatment reduces symptom severity, which in turn improves sleep, physical activity, dietary habits, and social functioning, and if it also reduces the chronic stress and inflammation associated with untreated OCD, then earlier and better treatment should plausibly slow or prevent many of the pathways through which OCD shortens life. The evidence is not yet proven in a randomized trial, but the chain of reasoning from existing data is strong enough to make early intervention a public health priority rather than merely a quality-of-life concern.
Common Misconceptions About OCD and Health
One persistent myth is that OCD is a personality quirk or a mild preference for order. This characterization is not just inaccurate; it is actively harmful to the people living with the disorder, because it contributes to the treatment delays described earlier. When friends, family members, or even clinicians view OCD as relatively benign, urgency evaporates. The mortality data make clear that OCD is a serious medical condition with life-shortening consequences.
Another misconception is that OCD’s health risks are entirely explained by depression. Depression is extremely common among people with OCD, and depression itself carries cardiovascular, metabolic, and suicide risk. But the Swedish cohort study specifically controlled for psychiatric comorbidities and still found elevated mortality, and the cardiovascular risk study found that results remained largely similar after excluding groups with various psychiatric comorbidities.5PubMed. Risk of specific cardiovascular diseases in obsessive-compulsive disorder Depression makes things worse, undoubtedly, but OCD itself appears to carry independent risk.
A third misconception is the idea that the “cleanliness” and “checking” aspects of OCD should make people healthier, since they are supposedly more careful about hygiene and safety. In reality, OCD compulsions are not rational health behaviors. Compulsive hand-washing can cause skin breakdown and infections. Checking rituals consume time and energy without providing real safety, and the mental distraction they cause may actually increase accident risk rather than reduce it. The disorder hijacks the brain’s threat-detection system, directing enormous resources toward perceived dangers that are often vanishingly small while leaving the person too depleted to address the genuine health risks accumulating quietly in the background.
The Sex Difference in Cellular Aging
One finding that deserves separate attention is the apparent sex difference in how OCD affects biological aging markers. In the study examining telomere length and mitochondrial DNA copy number, both men and women with OCD showed reduced mitochondrial DNA copy number, but only women showed significantly shortened telomeres in that particular analysis.8PubMed Central. Alterations of cellular aging markers in obsessive–compulsive disorder: mitochondrial DNA copy number and telomere length A more recent study, however, found shorter telomeres in OCD patients of both sexes, though the effect was somewhat stronger in women.9Journal of Psychiatric Research. Shorter telomere length in obsessive-compulsive disorder: another evidence of neuroprogression?
Researchers do not yet fully understand why women with OCD might show more pronounced cellular aging, but hormonal differences, differential stress responses, and differences in how men and women experience OCD symptoms are all plausible contributors. Women with OCD tend to have higher rates of contamination-related obsessions and washing compulsions, while men more often present with symmetry and sexual or religious obsessions. Whether these symptom profiles carry different physiological burdens is an open question. The research is still early, and the sex differences in cellular aging may narrow or sharpen as larger studies emerge. For now, the practical takeaway is that OCD’s physical health consequences are real for everyone, but women may face an especially steep biological cost from prolonged untreated illness.