Sleep apnea raises risk of long Covid by up to 75% for some, study says | CNN



CNN
 — 

Adults who have obstructive sleep apnea have up to an 75% increased risk, on average, of developing long Covid after a SARS-CoV-2 infection compared with people without sleep apnea, a new study found.

Women with obstructive sleep apnea had up to an 89% increased risk, while men had a 59% higher risk, according to the analysis of electronic health data on nearly 1.8 million people.

Obstructive sleep apnea is a potentially dangerous disorder in which breathing stops for about 10 seconds multiple times during the night due to a blockage of the airways by heavy or relaxed soft tissues in the mouth and throat.

A second analysis of medical records of a smaller group of 330,000 adults found the risk to be only 12%, according to the study, which is part of RECOVER, or Researching Covid to Enhance Recovery. RECOVER is a National Institutes of Health initiative dedicated to understanding why some people develop long Covid and how best to detect, treat, and prevent the condition.

Why the huge difference in numbers? People in the larger study had additional health concerns, or comorbidities, such as obesity, diabetes, high blood pressure and heart disease, said senior study author Lorna Thorpe, co-lead of the RECOVER Clinical Science Core at NYU Langone Health.

“The range of 12% to 75% is likely due to a combination of different study populations and different levels of comorbidities, but also different definitions of long Covid,” she said. “We didn’t even have a diagnostic code for long Covid until October 2021.

“I believe the risk is likely to be in the middle, but we will need additional studies to tease that out,” added Thorpe, a professor and director of the division of epidemiology at NYU Grossman School of Medicine.

A third analysis of medical records of 102,000 children with sleep apnea found no correlation between sleep apnea and long Covid after the various confounding health conditions were factored out, “which, of course, is great news,” Thorpe said.

“By using three very large networks of electronic health records, we were able to do this study three times, which is one of the strengths of the research,” she added. “This study is the first collaboration of this focus and scale to find that adults with sleep apnea are at greater risk for long Covid.”

This is an “important study” on long Covid, said Dr. Sairam Parthasarathy, a principal investigator of the University of Arizona Health Sciences RECOVER Adult Study and professor of medicine.

“Research needs to be done in a prospective study to verify this association, and if found to be true these findings have implications for treatment of long Covid,” said Parthasarathy, who was not involved in the study.

“It is important to note that some of the symptoms of long Covid such as fatigue may be related to obstructive sleep apnea, and that the treatment of obstructive sleep apnea may improve such long Covid-related symptoms,” he added.

The study, published Thursday in the journal Sleep, is one of a several studies released since Congress allocated $1.15 billion to NIH in January 2021, to study the long-term effects of Covid over a four-year period. To date, the agency says it has used about $811 million to fund research.

Researchers wanted to investigate the role of sleep apnea in long Covid due to the well-known association between the condition and poorer outcomes after a Covid infection.

“People with sleep apnea are at higher risk for a more severe case of Covid-19, admission to intensive care at the hospital and for mortality,” Thorpe said.

“Obstructive sleep apnea can result in increased inflammation, potentially disrupted sleep leading to an increased propensity to develop infections and reduced immunity,” said Dr. Bhanu Prakash Kolla, a sleep medicine specialist in the Center for Sleep Medicine at the Mayo Clinic in Rochester, Minnesota.

“This could potentially explain the pathway by which obstructive sleep apnea leads to an increased risk of having Covid and also … (long Covid),” said Kolla, who was not involved in the study.

Sleep apnea is an underdiagnosed condition regardless of gender, said the University of Arizona’s Parthasarathy.

“It is conservatively estimated that 80% of patients with obstructive sleep apnea (OSA) are not diagnosed,” he said. In addition, “an assumption with these analyses is that patients with OSA are likely to be treated. However, nearly half of them are not using the treatment.”

Why would women have up to an 89% higher risk compared with 59% in men? The study did not address that issue.

However, “one can postulate this difference may be based on what we know about sex differences in sleep and immune responses,” said Dr. Phyllis Zee, director of the Center for Circadian and Sleep Medicine at Northwestern University Feinberg School of Medicine in Chicago.

Zee, who was not involved with the new research, coauthored one of the first published studies on the link between sleep apnea and serious Covid infection.

“Women typically have stronger immune responses to viral infections, and thus also vulnerability for post-infection inflammation,” Zee said. “Women in general have more insomnia and with long Covid tend to present with fatigue and insomnia symptoms, which are also common symptoms of long Covid.”

Another reason could be that sleep apnea has historically been considered a male disease, Thorpe said, which could mean that by the time a woman is diagnosed her apnea is more advanced.

“It could be that the women who are documented in electronic health records have more severe sleep apnea because physicians more often look for sleep apnea among men,” she said.

As scientists continue to learn more about long Covid, further information will become available, Thorpe said. In the meantime, people who have sleep apnea — or who snore, snort and stop breathing at night, which are all signs of the condition — should be exceedingly careful when they contact Covid.

“People with sleep apnea who get infected with Covid should seek early treatment and consider getting Paxlovid, the oral medication prescribed to reduce risk of severe outcomes,” Thorpe said. “They should also keep up with their vaccinations to lower the risk of infection in the first place.”

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End of data sharing could make Covid-19 harder to control, experts and high-risk patients warn | CNN



KFF Health News
 — 

Joel Wakefield isn’t just an armchair epidemiologist. His interest in tracking the spread of covid is personal.

The 58-year-old lawyer who lives in Phoenix has an immunodeficiency disease that increases his risk of severe outcomes from covid-19 and other infections. He has spent lots of time since 2020 checking state, federal, and private sector covid trackers for data to inform his daily decisions.

“I’m assessing ‘When am I going to see my grandkids? When am I going to let my own kids come into my house?’ ” he said.

Many Americans have moved on from the pandemic, but for the millions who are immunocompromised or otherwise more vulnerable to covid, reliable data remains important in assessing safety.

“I don’t have that luxury to completely shrug it off,” Wakefield said.

The federal government’s public health emergency that’s been in effect since January 2020 expires May 11. The emergency declaration allowed for sweeping changes in the U.S. health care system, like requiring state and local health departments, hospitals, and commercial labs to regularly share data with federal officials.

But some shared data requirements will come to an end and the federal government will lose access to key metrics as a skeptical Congress seems unlikely to grant agencies additional powers. And private projects, like those from The New York Times and Johns Hopkins University, which made covid data understandable and useful for everyday people, stopped collecting data in March.

Public health legal scholars, data experts, former and current federal officials, and patients at high risk of severe covid outcomes worry the scaling back of data access could make it harder to control covid.

There have been improvements in recent years, such as major investments in public health infrastructure and updated data reporting requirements in some states. But concerns remain that the overall shambolic state of U.S. public health data infrastructure could hobble the response to any future threats.

“We’re all less safe when there’s not the national amassing of this information in a timely and coherent way,” said Anne Schuchat, former principal deputy director of the Centers for Disease Control and Prevention.

A lack of data in the early days of the pandemic left federal officials, like Schuchat, with an unclear picture of the rapidly spreading coronavirus. And even as the public health emergency opened the door for data-sharing, the CDC labored for months to expand its authority.

Eventually, more than a year into the pandemic, the CDC gained access to data from private health care settings, such as hospitals and nursing homes, commercial labs, and state and local health departments.

CDC officials have been working to retain its authority over some information, such as vaccination records, said Director Rochelle Walensky.

Walensky told the U.S. House in February that expanding the CDC’s ability to collect public health data is critical to its ability to respond to threats.

“The public expects that we will jump on things before they become public health emergencies,” she later told KFF Health News. “We can’t do that if we don’t have access to data.”

The agency is negotiating information-sharing agreements with dozens of state and local governments, Walensky said, as well as partnering with the Centers for Medicare & Medicaid Services. It is also lobbying for the legal power to access data from both public and private parts of the health care system. The hospital data reporting requirement was decoupled from the health emergency and is set to expire next year.

But it’s an uphill battle.

“Some of those data points we may not have anymore,” Walensky said, noting how access to covid test results from labs will disappear. That data became a less precise indicator as people turned to at-home testing.

Moving forward, Walensky said, the CDC’s covid tracking will resemble its seasonal flu surveillance, which uses information from sample sites to establish broad trends. It’ll offer a less granular view of how covid is spreading, which experts worry could make it harder to notice troubling new viral variants early.

Overall, federal courts — including the U.S. Supreme Court — have not been supportive of expanded public health powers in recent years. Some issued rulings to block mask mandates, pause mandatory covid vaccination requirements, and end the nationwide eviction moratorium.

Such power limits leave the CDC with its “utterly dysfunctional, antiquated” data collection system, said Lawrence Gostin, director of the O’Neill Institute for National and Global Health Law at Georgetown University. It’s like a “mosaic,” he said, in which states and territories collect data their own way and decide how much to share with federal officials.

Although covid numbers are trending down, the CDC still counts thousands of new infections and hundreds of new deaths each week. More than 1,000 Americans are also hospitalized with covid complications daily.

“When we stop looking, it makes it all more invisible,” Gostin said. “Covid knowledge and awareness is going to melt into the background.”

State and local public health officials are generally willing to share data with federal agencies, but they often run into legal hurdles that prevent them from doing so, said Marcus Plescia, chief medical officer of the Association of State and Territorial Health Officials.

It will take a lot of work to loosen state restrictions on public health data. And the political will may be lacking, considering many jurisdictions have rolled back public health powers in recent years. Until rules change, the CDC’s power to help states is limited, Plescia said.

“Their hands are tied a little bit in how much they can do,” he said.

Public health officials rely on data to target interventions and track how well they’re working. A lack of information can create blind spots that exacerbate poor outcomes for high-risk populations, said Denise Chrysler, a senior adviser for the Network for Public Health Law.

“If you don’t have the data, you can’t locate who you’re failing to serve. They’re going to fall between the cracks,” she said.

The lack of covid data broken down by race and ethnicity in the early days of the pandemic obscured the outsize impact covid had on marginalized groups, such as Black and Hispanic people, Chrysler said. Some states, like New Jersey and Arizona, issued rules to mandate the collection of race and ethnicity data for covid, but they were temporary and tied to state emergency declarations, she said.

Inconsistent local data precipitated the end of privately run projects that supplemented government resources.

The available data researchers could pull from “was just terrible,” said Beth Blauer, associate vice provost for public sector innovation at Johns Hopkins, who helped launch its dashboard. The decision to end the program was practical.

“We were relying on publicly available data sources, and the quality had rapidly eroded in the last year,” she said.

The fast collapse of the data network also raises questions about state and local agencies’ long-term investments in tracking covid and other threats.

“I wish that we had a set of data that would help us guide personal decision-making,” Blauer said. “Because I’m still fearful of a pandemic that we don’t really know a ton about.”

To Schuchat, formerly of the CDC, there’s a lot of ground to regain after years of underinvestment in public health, long before the covid pandemic — and high stakes in ensuring good data systems.

The CDC’s detection of a vaping-related lung illness in 2019 was recognized after case reports from a hospital in Wisconsin, she said. And she attributed the nation’s slow reaction to the opioid crisis on poor access to emergency room data showing a troubling trend in overdoses.

“We’re much better when we detect things before there’s an emergency,” Schuchat said. “We can prevent major emergencies from happening.”

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