Categories: COVID-Patients

Long COVID Seen in Patients With Severe and Mild Disease

Editor’s note: Find the latest COVID-19 news and guidance in Medscape’s Coronavirus Resource Center.

People hospitalized with acute COVID-19 who developed acute severe respiratory distress syndrome (ARDS) had poorer exercise capacity, health-related quality of life, and overall health than the general population a median of 8 months after initial COVID diagnosis, according to a prospective cohort study.

Findings from the cohort, composed of 113 COVID-19 survivors who developed ARDS after admission to a single center before to April 16, 2020, were presented online at the 31st European Congress of Clinical Microbiology & Infectious Diseases by Judit Aranda, MD, from Complex Hospitalari Moisés Broggi in Barcelona, Spain.

Median age of the participants was 64 years, and 70% were male. At least one persistent symptom was experienced during follow-up by 81% of the cohort, with 45% reporting shortness of breath, 50% reporting muscle pain, 43% reporting memory impairment, and 46% reporting physical weakness of at least 5 on a 10-point scale.

Of the 104 participants who completed a 6-minute walk test, 30% had a decrease in oxygen saturation level of at least 4%, and 5% had an initial or final level below 88%. Of the 46 participants who underwent a pulmonary function test, 15% had a forced expiratory volume in 1 second (FEV1) below 70%.

And of the 49% of participants with pathologic findings on chest x-ray, most were bilateral interstitial infiltrates (88%).

In addition, more than 90% of participants developed depression, anxiety, or post-traumatic stress disorder, Aranda reported.

Not the Whole Picture

This study shows that sicker people — “those in intensive care units with acute respiratory distress syndrome” — are “more likely to be struggling with more severe symptoms,” said Christopher Terndrup, MD, from the division of general internal medicine and geriatrics at Oregon Health and Science University in Portland.

But a Swiss study, also presented at the meeting, “shows how even mild COVID cases can lead to debilitating symptoms,” Terndrup told Medscape Medical News.

The investigation of long-term COVID symptoms in outpatients was presented online by Florian Desgranges, MD, from Lausanne University Hospital in Switzerland. He and his colleagues found that more than half of those with a mild to moderate disease had persistent symptoms at least 3 months after diagnosis.

The prevalence of long COVID has varied in previous research, from 15% in a study of healthcare workers, to 46% in a study of patients with mild COVID, 52% in a study of young COVID outpatients, and 76% in a study of patients hospitalized with COVID.

Desgranges and his colleagues evaluated patients seen in an emergency department or outpatient clinic from February to April 2020.

The 418 patients with a confirmed COVID-19 diagnosis were compared with a control group of 89 patients who presented to the same centers during the same timeframe with similar symptoms — cough, shortness of breath, or fever — but had a negative SARS-CoV-2 test.

The number of patients with comorbidities was similar in the COVID and control groups (34% vs 36%), as was median age (41 vs 36 years) and the prevalence of women (62% vs 64%), but the proportion of healthcare workers was lower in the COVID group (64% vs 82%; P =.006).

Symptoms that persisted for at least 3 months were more common in the COVID than in the control group (53% vs 37%). And patients in the COVID group reported more symptoms than those in the control group after adjustment for age, gender, smoking status, comorbidities, and timing of the survey phone call.

Association Between Persistent Symptoms and COVID-19
Persistent Symptom Adjusted Odds Ratio P Value
Any 2.0 .02
Fatigue 2.1 .02
Shortness of breath 2.8 .03
Loss of smell or taste 26.5 .01
Memory impairment 5.7 .01

Levels of sleeping problems and headache were similar in the two groups.

“We have to remember that with COVID-19 came the psychosocial changes of the pandemic situation” Desgranges said.

This study suggests that some long-COVID symptoms — such as the fatigue, headache, and sleep disorders reported in the control group — could be related to the pandemic itself, which has caused psychosocial distress, Terndrup said.

Another study that looked at outpatients “has some fantastic long-term follow-up data, and shows that many patients are still engaging in rehabilitation programs nearly a year after their diagnosis,” he explained.


That prospective longitudinal COVID HOME study, which assessed long-term symptoms in people who were never hospitalized for COVID, was presented online by Adriana Tami, MD, PhD, from the University Medical Center Groningen in the Netherlands.

The researchers visited the homes of patients to collect data, blood samples, and perform PCR testing 1, 2, and 3 weeks after a diagnosis of COVID-19. If their PCR test was still positive, testing continued until week 6 or a negative test. In addition, participants completed questionnaires at week 2 and at months 3, 6 and 12 to assess fatigue, qualit

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