The mental health crisis among survivors will require diverse and accessible forms of support
One in five COVID-19 patients diagnosed with new mental health problems within three months post-infection, primarily anxiety, insomnia, and dementia. Bidirectional link confirmed: people with pre-existing psychiatric conditions have 65% higher risk of contracting COVID-19, suggesting behavioral and biological factors.
- 18% of COVID-19 patients diagnosed with new mental health conditions within 90 days
- Study analyzed 70 million US patient records, 62,354 with COVID-19 diagnosis
- Pre-existing psychiatric conditions increase COVID-19 infection risk by 65%
- Anxiety, insomnia, and dementia were most common diagnoses
- Published in Lancet Psychiatry, November 2020
Oxford University study of 70 million US patient records found 18% of COVID-19 patients developed mental health issues within 90 days, with anxiety, insomnia, and dementia most common. Bidirectional relationship discovered: pre-existing psychiatric conditions increase COVID infection risk by 65%.
Nearly a year into the pandemic, researchers at Oxford University completed a sweeping analysis of 70 million patient records in the United States and found something unsettling: one in five people who had contracted COVID-19 developed a mental health condition within three months of infection. The study, published in Lancet Psychiatry and led by Paul Harrison from Oxford's Department of Psychiatry, examined 62,354 patients diagnosed with the virus between January 20 and April 1, 2020—most of whom were not hospitalized. When Harrison's team compared their outcomes to patients who had suffered from six other conditions—influenza, other respiratory problems, kidney stones, gallstones, skin infections, and fractures—the difference was stark. COVID-19 survivors were twice as likely to receive a new psychiatric diagnosis.
The mental health problems clustered in a specific window: between two weeks and three months after infection. Anxiety disorders dominated the findings, followed by insomnia and dementia. The 18 percent figure, however, came with an important caveat from the researchers themselves. This was almost certainly an undercount. Some patients never sought care or received a diagnosis. Others may have visited clinics outside the federal health network the study examined. The true number of people struggling with new mental health symptoms was likely much higher.
But the study revealed something more complex than a simple cause-and-effect relationship. The researchers discovered what they called a bidirectionality: people who already had psychiatric conditions before contracting COVID-19—those with attention deficit hyperactivity disorder, bipolar disorder, depression, or schizophrenia—had a 65 percent higher risk of being diagnosed with the virus itself. This relationship held steady across both sexes and all age groups, even when researchers adjusted for socioeconomic factors like housing and income. The finding suggested that behavioral factors played a role: people with psychiatric conditions might be less likely to follow social distancing guidelines, or they might smoke at higher rates. Some psychiatric medications also create a pro-inflammatory state in the body that could increase susceptibility to infection.
Paul Harrison emphasized that healthcare systems needed to prepare mental health services for the wave of survivors who would need support. His colleague Maxine Taquet went further, arguing that psychiatric conditions should be added to the official list of COVID-19 risk factors—a designation that would change how public health officials approached vulnerable populations. Til Wykes, a psychiatrist at King's College London who reviewed the study, called it "clearly the tip of the iceberg." The mental health crisis among COVID survivors, he warned, would require diverse and accessible forms of support.
The anxiety findings were particularly striking because researchers could not yet determine whether post-COVID anxiety would develop into something resembling post-traumatic stress disorder. Insomnia rates were markedly elevated, consistent with what scientists expected from disruptions to circadian rhythms after a serious infection. The dementia findings troubled the Oxford team most—a two to three-fold increase in risk. Some of this might reflect cases of delirium that were misdiagnosed as dementia, or temporary cognitive problems from reversible brain events. But the researchers had excluded the first two weeks after infection, when delirium was most common, and they found that hospitalized patients—who were more prone to delirium—did not show higher dementia rates than outpatients. This suggested something deeper was happening.
As the world grappled with the immediate crisis of COVID-19 transmission and death, the Oxford study pointed to a second, slower-moving catastrophe unfolding in the minds of survivors. Mental health services were already strained before the pandemic. Now they would face millions of new patients, many of them experiencing psychiatric symptoms for the first time in their lives. And the most vulnerable—people already living with mental illness—faced a compounded burden: they were both more likely to catch the virus and more likely to suffer its psychological aftermath.
Citas Notables
Healthcare systems need to prepare mental health services for survivors, and psychiatric conditions should be added to the official list of COVID-19 risk factors— Paul Harrison and Maxine Taquet, Oxford University researchers
This is clearly the tip of the iceberg. We need to develop as many different and accessible forms of mental health support as possible— Til Wykes, King's College London psychiatrist
La Conversación del Hearth Otra perspectiva de la historia
Why does COVID-19 seem to trigger mental health problems specifically in the weeks after infection, rather than immediately?
The researchers didn't fully explain the mechanism, but the timing suggests the virus itself or the body's immune response to it may be directly affecting the brain. They noted that insomnia rates were elevated in ways consistent with disrupted circadian rhythms, which points to something biological happening, not just the psychological stress of being sick.
The 65 percent increased risk for people with pre-existing psychiatric conditions—is that saying mental illness makes you more vulnerable to COVID, or that COVID is more likely to be diagnosed in people who already see doctors?
It's probably both, but the researchers leaned toward real vulnerability. The relationship held even after adjusting for socioeconomic status. They suggested behavioral factors—less adherence to safety guidelines, higher smoking rates—and also that some psychiatric medications create inflammation in the body. It's not just that these patients were more likely to be tested.
The study excluded the first 14 days after infection. Why?
Because delirium is common in the acute phase of severe illness and can look like dementia. By starting at day 14, they could distinguish between temporary confusion and longer-lasting cognitive problems. But it also means they may have missed some mental health issues that appeared and resolved quickly.
If 18 percent is an underestimate, what's the real number?
No one knows. The researchers identified two major gaps: patients who never sought care, and patients who went to clinics outside the federal database. Given how many people avoid mental health treatment even when they need it, the actual figure could be significantly higher.
What surprised the Oxford team most?
That psychiatric history was itself a risk factor for catching COVID. They expected mental health problems to follow infection, but the bidirectional relationship—that people with depression or schizophrenia were more likely to get infected in the first place—was unexpected and troubling because it suggested a vulnerable population was being hit twice.
What happens next?
The researchers are calling for mental health services to be ready. But healthcare systems were already overwhelmed. Now they need to prepare for millions of survivors with new psychiatric conditions, while also protecting the people who were already struggling before the pandemic began.