United States: Emerging research released on July 27 in Academic Radiology indicated that COVID-19 survivors afflicted with diabetes necessitate extended scrutiny for pulmonary irregularities.
In the nascent phases of the pandemic, diabetes was correlated with elevated mortality rates, heightened disease severity, and adverse prognoses. In an endeavor to elucidate the enduring repercussions of this association, Chinese radiology specialists embarked on a forward-looking investigation involving nearly 300 convalescent coronavirus patients, according to radiologybusiness.com.
Three years post-infection, those with diabetes exhibited a greater prevalence of respiratory ailments, lung anomalies evident in CT imaging, and impaired oxygen diffusion into the bloodstream. Contributing factors included diabetes, allergic predispositions, female gender, fibrotic-like modifications in chest imaging, and severe COVID-19 episodes, all independently predictive of persistent pulmonary afflictions, as noted by the experts.
“These findings underscore the protracted detrimental impact of diabetes on radiological pulmonary anomalies and respiratory dysfunction in COVID-19 survivors,” asserted Linxia Wu, MD, PhD, from the Department of Radiology at Union Hospital in Wuhan, China, alongside co-authors. “This study furnishes critical evidential support for the prolonged surveillance of pulmonary abnormalities in COVID-19 convalescents with diabetes,” as per radiologybusiness.com.
The researchers enlisted 278 patients recuperating from the virus for their multicenter investigation. This cohort comprised 111 diabetic individuals (predominantly Type 2, accounting for 97%) and 167 non-diabetic controls. Subjects underwent serial chest CT scans, completed symptomatology questionnaires, and performed pulmonary function tests at six months, one year, two years, and three years post-discharge. Age, gender, and COVID-19 severity distribution were analogous between both cohorts.
Among diabetic survivors, nearly 30% experienced respiratory symptoms, 50% exhibited diminished lung diffusion capacity for carbon monoxide, and 51% displayed radiological lung anomalies at the three-year juncture, with all metrics surpassing those of the control group, the authors noted. Persistent CT alterations, such as bronchiectasis and honeycombing, potentially signaled “irreversible lung damage in COVID-19 survivors.”
Wu and colleagues referred to such damage as “fibrotic-like changes,” with a higher incidence among the diabetes group compared to control subjects.
“The chronic inflammatory state associated with diabetes may have predisposed individuals to heightened susceptibility to damage induced by COVID-19,” the authors mentioned. “This could potentially initiate a deleterious cycle characterized by cytokine release and hyperglycemic surges, propelling COVID-19 participants with diabetes toward poorer clinical outcomes,” radiologybusiness.com reported.
Previous studies have corroborated that COVID-19 survivors with preexisting diabetes face an amplified risk of exacerbated disease, particularly among those with poorly controlled HbA1c levels (> 8.6%), Wu and co-authors noted.
“Despite various anti-diabetic treatments adopted by diabetic individuals in this study, their HbA1c and fasting plasma glucose levels remained elevated compared to non-diabetic counterparts. This potentially contributes to a higher incidence of persistent lung anomalies in the diabetic cohort,” the authors wrote, as per radiologybusiness.com.
Wu and colleagues cautioned that their dataset was limited and specifically focused on unvaccinated individuals who were not infected with the original COVID-19 strain. Hence, the results might not be generalizable to those who encountered variant strains or received vaccinations. Additionally, most subjects had Type 2 diabetes, necessitating further research on individuals with Type 1 diabetes.
Nonetheless, “These findings underscore the significance of prolonged monitoring and surveillance for the specific subset of COVID-19 recovery survivors with concurrent diabetes,” the study concluded.