A new Western University-led has shed more light on the impacts of COVID-19, suggesting patients may experience short- and long-term cognitive impairments following infection, which can be similar to those caused by sleep deprivation.
Published on Sept. 6 in the journal Cell Reports Medicine, the study, performed in collaboration with the University of Cambridge, Sunnybrook Health Sciences Centre, and the University of Ottawa, was conducted online between June 2020 and February 2021. It looked at the overall cognitive performance of 478 adult volunteers about three months after they had a confirmed COVID-19 diagnosis.
The study found that patients post-COVID had significant deficits in reasoning, thinking speed, and verbal abilities. Notably, no losses in memory function, commonly referred to as brain fog, were found.
“The pattern of cognitive impairment in these COVID-19 patients resembles that of healthy study participants who are sleep deprived,†Adrian Owen, study co-author and Western University professor, said in a Tuesday .
Owen previously conducted a in 2017 on the impacts of sleep deprivation, which found that participants’ reasoning and verbal abilities were most impacted by limited sleep.
The cognitive impacts noticed in participants weren't limited to those with extreme cases, but rather the severity of the impairments was "directly related to the severity of the original infection."
“The worse the COVID-19 symptoms were for the patient, the worse the cognitive impairments were, as well,†Conon Wild, study co-author, said in the release, noting that significant impairments were also seen in people with mild infections.
The degree of cognitive impairment was also discovered to be unrelated to the interval between COVID-19 infection and the assessment, indicating that impairments may be long-lasting, the study found.
According to Wild, the deficits were not less severe for those who were up to three months post-infection, which shows that these effects might not go away in the short-term.
Participants in the study also displayed significantly higher levels of depression and anxiety, with 30 per cent matching the clinical criteria for either one or both conditions.
But, this wasn't related to the severity of their infection or the resulting cognitive impairments, but likely "the result of living through the pandemic itself,†Richard Swartz, study co-author, said in the release.
The University of Waterloo researchers found in May that data showed nearly a quarter of Canadians reported high levels of anxiety – numbers largely unchanged since 2020.
Their survey found that 23 per cent of Canadians are facing high anxiety, while 15 per cent are experiencing high depression, and that patients suffering from long COVID are at higher risk.
Software company Mustimuhw Information, which develops medical records systems built on a foundation of Indigenous traditions and values, is allowing health providers to capture data informed by cultural practices.
Lebanon's Hezbollah was still handing its members new Gold Apollo branded pagers hours before thousands blew up this week, two security sources said, indicating the group was confident the devices were safe despite an ongoing sweep of electronic kit to identify threats.
Following the MIND diet for 10 years produced a small but significant decrease in the risk of developing thinking, concentration and memory problems, a new study found.
The province's public security minister said he was "shocked" Thursday amid reports that a body believed to be that of a 14-year-old boy was found this week near a Hells Angels hideout near Quebec City.
An Ontario man says it is 'unfair' to pay a $1,500 insurance surcharge because his four-year-old SUV is at a higher risk of being stolen.
The federal firearm buyback program has cost taxpayers nearly $67.2 million since it was announced in 2020, but it still hasn't collected a single gun.
If something looks too good to be true, it might be. That's the message from Saskatchewan horticulturists after customers have come into their stores hoping to buy purple apple trees this month.
The Royal Canadian Mounted Police has lost 205 firearms since 2020, including more than 120 handguns and at least five fully automatic weapons like machine-guns.
For most people, dinner on a cruise ship is a time to relax. But when influencer couple Abby and Matt Howard decided to kick back with a dinner à deux, they ended up kicking up a storm.
In the middle of the small crowd — near the tents, the lineup of kids awaiting face painting, the snack table — stood a jubilant Chiara Padovani. 'When I say 'tenant, you say 'power,'' she commanded to several dozen tenants, who chanted back with gusto. What looked like a summer block party in front of two north-end Toronto apartment buildings last month was a celebration of what renters who withheld payments for months called a 'huge victory.'
The University of Ottawa's special advisor on antisemitism says he has resigned following posts he made on social media celebrating the pager explosions in Lebanon this week.
B.C.'s police watchdog is investigating the death of a woman who was shot by the RCMP after allegedly barricading herself in a room with a toddler early Thursday morning.
Friends and strangers have set up a makeshift memorial outside the home of a five-year-old boy who was found dead yesterday in Coteau-du-lac.
The Royal Canadian Mounted Police has lost 205 firearms since 2020, including more than 120 handguns and at least five fully automatic weapons like machine-guns.
The lawyer for a B.C. RCMP officer convicted of obstruction for telling a witness to delete cellphone video following the violent 2017 arrest of Dale Culver has requested a stay of proceedings.
Israel warned U.S. Defence Secretary Lloyd Austin in a call Tuesday that a military operation was going to take place in Lebanon but gave no details, U.S. officials said Thursday. The same day of the call, in an attack widely blamed on Israel, thousands of pagers belonging to Hezbollah militants exploded.
Lawmakers are scrambling to ensure that the U.S. Secret Service has enough money and resources to keep the nation's presidential candidates safe amid repeated threats of violence. It's unclear, though, how much they can do with only weeks before the election, or if additional dollars would make an immediate difference.
A federal law enforcement agency confirmed it's opened an investigation into Robert F. Kennedy Jr. after he allegedly cut off the head of a dead whale and took it home two decades ago.
The mayor of a French town making headlines for the trial of dozens of men accused of rapes that occurred there over almost a decade has apologized for comments that appeared to downplay the case.
Lebanon's Hezbollah was still handing its members new Gold Apollo branded pagers hours before thousands blew up this week, two security sources said, indicating the group was confident the devices were safe despite an ongoing sweep of electronic kit to identify threats.
Mexican President Andres Manuel Lopez Obrador blamed the United States in part on Thursday for the surge in cartel violence terrorizing the northern state of Sinaloa which has left at least 30 people dead in the past week.
Prime Minister Justin Trudeau tapped Treasury Board President Anita Anand to take on additional duties as Canada's minister of transport on Thursday.
Conservative Leader Pierre Poilievre and NDP Leader Jagmeet Singh got into a heated exchange in the House of Commons on Thursday, just minutes after Singh announced his party would not be supporting the Conservatives' first non-confidence motion against Prime Minister Justin Trudeau's government.
The head of Via Rail repeatedly told MPs a train delay over the Labour Day long weekend was an isolated incident, despite a similar event two years ago.
The Nunavut government says it will provide immunization against respiratory syncytial virus to all infants in the territory this fall, a policy change that one pediatric infectious diseases specialist has been advocating for decades.
Ontario’s Minister of Sport, Neil Lumsden, will donate his brain to research.
Software company Mustimuhw Information, which develops medical records systems built on a foundation of Indigenous traditions and values, is allowing health providers to capture data informed by cultural practices.
Lebanese authorities on Thursday banned walkie-talkies and pagers from being taken on flights from Beirut airport, the National News Agency reported, after thousands of such devices exploded during a deadly attack on Hezbollah this week.
If something looks too good to be true, it might be. That's the message from Saskatchewan horticulturists after customers have come into their stores hoping to buy purple apple trees this month.
NASA scientists have successfully replicated spider-like shapes found on the surface of Mars in a laboratory setting for the first time.
Lawyers representing the producers of 'Russians at War' say they may pursue legal action against Ontario's public broadcaster for pulling support for the controversial documentary amid outcry from the Ukrainian community and some Canadian politicians.
Viewers of Jeopardy got a chance to test their knowledge of trivia about B.C.'s biggest city Wednesday night.
British actress Florence Pugh has revealed that shaving her head for her latest movie role was a 'really bizarre' experience that sent her body 'into a bit of trauma.'
A case involving stolen funds from a Saskatchewan business being used to purchase cryptocurrency will be heading back to the courts, thanks to a new decision by Saskatchewan's Court of Appeal.
Bank of Canada governor Tiff Macklem says there is a lot of uncertainty around how artificial intelligence could affect the economy moving forward, including the labour market and price growth.
Aurora Cannabis Inc. says chief executive Miguel Martin is adding the title of executive chairman.
A huge king penguin chick named Pesto, who weighs as much as both his parents combined, has become a social media celebrity and a star attraction at an Australian aquarium.
They say a dog is a man’s best friend. In the case of Darren Cropper, from Bonfield, Ont., his three-year-old Siberian husky and golden retriever mix named Bear literally saved his life.
Trips can make lifelong memories when they go off without a hitch, but cancellations and rescheduled events are common because of artist illnesses, poor ticket sales, security threats, unruly weather and natural disasters.
Shohei Ohtani became the first major league player to hit 50 home runs and steal 50 bases in a season, with the Los Angeles Dodgers star going deep twice to reach the half-century mark and swiping two bags to get to 51 against the Miami Marlins on Thursday.
Vancouver Canucks goalie Thatcher Demko says he's been working his way back from a rare lower-body muscle injury since being sidelined in last season's playoffs.
Toronto Blue Jays shortstop Bo Bichette returned to the 10-day injured list Thursday due to a right middle finger fracture.
An Ontario man says it is 'unfair' to pay a $1,500 insurance surcharge because his four-year-old SUV is at a higher risk of being stolen.
Video of a brazen daylight auto theft which shows a suspect running over a victim in a stolen luxury SUV has been released by police west of Toronto.
The plant was expected to produce batteries for a million electric vehicles a year. Once up and running, it was supposed to create hundreds of permanent jobs in a small southeastern Ontario municipality. But two years later, spending on the construction of the Umicore plant has been delayed in what the company calls a "significant worsening of the EV market context."
They say a dog is a man’s best friend. In the case of Darren Cropper, from Bonfield, Ont., his three-year-old Siberian husky and golden retriever mix named Bear literally saved his life.
Paleontologists from the Royal B.C. Museum have uncovered "a trove of extraordinary fossils" high in the mountains of northern B.C., the museum announced Thursday.
The search for a missing ancient 28-year-old chocolate donkey ended with a tragic discovery Wednesday.
The Royal Canadian Mounted Police is celebrating an important milestone in the organization's history: 50 years since the first women joined the force.
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A Good Samaritan in New Brunswick has replaced a man's stolen bottle cart so he can continue to collect cans and bottles in his Moncton neighbourhood.
David Krumholtz, known for roles like Bernard the Elf in The Santa Clause and physicist Isidor Rabi in Oppenheimer, has spent the latter part of his summer filming horror flick Altar in Winnipeg. He says Winnipeg is the most movie-savvy town he's ever been in.
Edmontonians can count themselves lucky to ever see one tiger salamander, let alone the thousands one local woman says recently descended on her childhood home.
A daytrip to the backcountry turned into a frightening experience for a Vancouver couple this weekend.
B.C.'s police watchdog is investigating the death of a woman who was shot by the RCMP after allegedly barricading herself in a room with a toddler early Thursday morning.
Since she was a young girl growing up in Vancouver, Ginny Lam says her mom Yat Hei Law made it very clear she favoured her son William, because he was her male heir.
The 'Namgis First Nation says a fish farm it owns near Port McNeill shows the potential of land-based aquaculture in B.C.
For the last seven-and-half months, Toronto resident Heather McArthur has been living out what she describes as her “worst nightmare.â€
An Ontario man says it is 'unfair' to pay a $1,500 insurance surcharge because his four-year-old SUV is at a higher risk of being stolen.
Toronto police say a driver who crashed into a house in the city’s west end early Friday morning has been arrested on suspicion of impaired driving.
Defence counsel for accused murderer John-Christopher Arrizza argues he was in an “altered state of mind†due to days of drug and alcohol use, sleep deprivation and not eating, when he fatally stabbed a man at a Banff nightclub in 2022.
The Parole Board of Canada says a man who assaulted a young pregnant woman and left her for dead remains too dangerous to be released into the community.
Five bison are dead at Elk Island National Park east of Edmonton following an early Thursday morning collision.
A man has been taken to hospital in life-threatening condition following a stabbing incident that happened on Baseline Road in the early hours of Friday morning, according to the Ottawa Paramedic Service.
Police say a man who was taken to hospital in critical condition after being shot Thursday night has died.
Higher than average temperatures are in the forecast for Ottawa this Friday.
The province's public security minister said he was "shocked" Thursday amid reports that a body believed to be that of a 14-year-old boy was found this week near a Hells Angels hideout near Quebec City.
Premier François Legault's approval rating continued to rise this summer, according to the Angus Reid Institute. After reaching a low at the end of 2023, his support rose by three percentage points over the summer to 39 per cent.
A harrowing video has been presented to a jury at the trial of three men facing first-degree murder charges.
Five bison are dead at Elk Island National Park east of Edmonton following an early Thursday morning collision.
An Edmonton man who is charged with sexually assaulting a teen boy is a member of the Alberta sheriffs, CTV News Edmonton has confirmed.
The mayor of Fort Saskatchewan apologized on Thursday for comments she made earlier this week about killing feral cats.
Gas prices increased in all three Maritime provinces for the first time in more than a month.
A section of Herring Cove Road in the Spryfield area of Halifax is closed to traffic in both directions following a single-vehicle collision Friday morning.
Police are asking people to avoid the Dartmouth Commons area in Dartmouth, N.S., as they assist with a wildlife call for a bear.
Manitobans are continuing to mop up after a deluge of rain hit southern Manitoba earlier in the week.
Shamattawa RCMP are searching for a missing six-year-old boy who hasn’t been seen since Wednesday morning.
A Winnipeg pet rescue is putting out a warning to dog owners across the city about a possible parvovirus in the province.
A social media post of purple apples “growing†in Saskatchewan has sparked a lot of attention. However, garden experts say there's no such thing.
A case involving stolen funds from a Saskatchewan business being used to purchase cryptocurrency will be heading back to the courts, thanks to a new decision by Saskatchewan's Court of Appeal.
Environment and Climate Change Canada (ECCC) has confirmed a tornado touched down Wednesday evening near Langbank, Sask.
Amber and Adam Brueckner have a pool-shaped hole in their backyard – and their wallets.
New details have been shared about a missing family that was last seen on Sept. 1 in Kitchener, Ont.
Police are trying to identify a man who approached a woman and child in Wellesley.
A gym teacher at a private Christian school in Saskatoon has been charged. Terra MacEwan, 44, is charged with assault with a weapon. A Saskatoon mother who spoke with CTV News says her autistic son was MacEwan's victim.
Thomas Hamp says he believed secret police were out to kidnap, torture, and kill him when he fatally stabbed his girlfriend Emily Sanche in February of 2022.
A social media post of purple apples “growing†in Saskatchewan has sparked a lot of attention. However, garden experts say there's no such thing.
James Bay Ontario Provincial Police have charged four commercial vehicle drivers with impaired, including one who was hauling 36,000 kilograms of ammonia hydrate.
As northern Ontario gets ready to welcome autumn this weekend, it’s still feeling a lot like summer as provincial forest fire crews continue to battle blazes.
An Ontario man says it is 'unfair' to pay a $1,500 insurance surcharge because his four-year-old SUV is at a higher risk of being stolen.
Police say just before 7:00 p.m. four teens entered a business in the 1000 block of Adelaide Street North.
Police were focusing their attention on the northeast corner of Richmond and Horton, with members of the emergency response unit taking up positions at the scene.
Shedden, southwest of London, hasn’t changed much in decades – but word is spreading that hundreds of new residents could soon be calling the town home.
Two men from Barrie have been charged after a deadly shooting at a park in Keswick on Wednesday.
A growing group of brides and wedding photographers from across the province say they have been taken for tens of thousands of dollars by a Barrie, Ont. wedding photographer.
Ontario Provincial Police executed a search warrant in Walkerton.
Standing up, speaking out, and showing solidarity — survivors and supporters gathered in the core to take back the night in Windsor. The city is just one of a growing list of communities that have declared intimate partner violence (IPV) an epidemic.
The Windsor Police Service (WPS) has seized over $56,000 in drugs and have arrested one suspect.
SERVEONE Canada, a global procurement solution company, has begun Canadian operations in Tecumseh.
In a rare move, the Greater Victoria School District Board of Education has been slapped with a ministerial order from the province requiring it to update a student safety plan – drawing concern around political posturing leading up to an election.
The Union of B.C. Municipalities is asking the provincial government to make transit free for teenagers.
To appreciate why Mimi Vandermolen is so pleased to notice one particular vehicle she’s walking past, you need to know that seeing this many cars in one place would have been unimaginable when she was growing-up in the post-war Netherlands.
A pair of runaway pigs are in the custody of an animal sanctuary in the Okanagan after evading police and volunteers for hours earlier this week.
The Red Bridge, a historic landmark in Kamloops, B.C., was completely destroyed by fire early Thursday morning.
Animal protection officers in British Columbia have rescued three pit bulls – including one that gave birth to 10 puppies – from a rat-infested home in Kelowna.
A Vulcan, Alta., man has been charged with a Lethbridge woman's murder after her body was found in the Oyen area.
A Lethbridge couple got a good reminder as to why you should keep your vehicle doors locked at all times.
Lethbridge residents who live near the police range can expect to hear plenty of shots fired Wednesday and Thursday.
A new community health profile in the Algoma District shows the area is significantly below provincial averages in a number of health metrics.
North Bay Police Service says one person has died following an industrial accident at the Ontario Northland Transportation Commission Rail Yard on Tuesday.
Three northern Ontario residents are charged with drug trafficking after the vehicle they were in got stuck along a bush road off Highway 17 on Monday.
Newfoundland and Labrador's chief medical officer is monitoring the rise of whooping cough infections across the province as cases of the highly contagious disease continue to grow across Canada.
A 16-year-old biennial event aimed at fostering business in the country's eastern Arctic and northern regions has been cancelled indefinitely as a dispute unfolds between Inuit in Canada and a Labrador group claiming to share their heritage.
Jim Lester’s farm hopped on the cow-cuddling trend in early August, and his time slots have been pretty well sold out ever since.
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