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Why is controlling diabetes even more important during the COVID-19 pandemic?

By Apollo 24/7, Published on- 01 October 2020

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The Coronavirus can infect anybody in the community, but the elderly and people with underlying conditions such as diabetes, heart conditions, lung disease, etc. are likely to be most severely ill if they contract the virus. In this article, we will look at how people with diabetes are affected by COVID-19 and what they can do to lower the risk of infection. Let us begin by understanding what diabetes is.
Diabetes is a chronic metabolic condition that occurs due to a lack of insulin or failure of the body’s cells to respond to insulin. According to the International Diabetes Federation (IDF), people with diabetes are vulnerable to becoming severely ill if infected with the Coronavirus. However, not all diabetic people are at the same level of risk due to COVID-19. The outcomes will depend on how individuals control/monitor their blood sugar levels. 

How does COVID-19 impact people with pre-existing diabetes? 

According to the Centre for Disease Control and Prevention (CDC), having type 2 diabetes increases the risk of severe illness from COVID-19. Type 1 diabetes and gestational diabetes may also increase the risk of severe illness from COVID-19. One of the published studies by the CDC revealed that there were 6 times higher hospitalization and 12 times higher death reports found in COVID-19 patients with underlying conditions like diabetes.
The reason for people with pre-existing diabetes being at higher risk may be because of two factors – the destruction of insulin-producing cells in the pancreas and a compromised immune system. Both reasons have been briefly described below:
  • According to the published study in the New England Journal of Medicine, Coronavirus binds to angiotensin-converting enzyme 2 (ACE-2) receptors for entering the human body. The ACE-2 receptors are abundant in the beta cells of the pancreas. These cells control the release of insulin. When the Coronavirus infects these cells, they lose their insulin-secreting capacity with stress and inflammation (due to cytokine storm). This leads to rapid metabolic deterioration with the development of diabetic ketoacidosis. 
  • People with diabetes have a low immune response and high inflammation compared to persons who have normal blood glucose. Hence, they have a low ability to fight the Coronavirus thereby prolonging the recovery period. Scientific evidence suggests that diabetic people infected by COVID-19 had significantly increased levels of inflammatory markers (cytokines, interleukin-6, tumor necrosis factor, and C-reactive protein). Additionally, Coronavirus triggers the immune response producing T cells and B cells (antibodies). Triggered immune response and inflammation may also lead to ‘cytokine storm’ causing more cell damage in diabetic people than those without diabetes.   

Increased risk of diabetes ketoacidosis (DKA) 

Diabetes ketoacidosis (DKA) is a life-threatening condition that is most commonly seen in patients with type 1 diabetes, but other serious situations can trigger it in type 2 patients as well. When the body cannot produce enough insulin, the body produces excess acids in the bloodstream called ketones resulting in diabetes ketoacidosis. Even though data is still scarce and researchers are conducting various studies, recent findings show that among patients with pre-existing diabetes, DKA may be a likely complication of severe COVID-19. 

Clinical evidence correlating higher risk of severe COVID-19 illness in diabetic patients

  • The CORONADO study: This is the first study that highlighted the risk of severe COVID-19 illness among people with diabetes (average age 70) admitted to 53 French hospitals between 10- 31 March 2020. Out of a total of 1,317 COVID-19 patients under study, 1,172 (89%) subjects had type 2 diabetes while 39 (3%) had type 1 diabetes. The results reveal that 10% of this group of patients died within 7 days of hospital admission while 20% required ventilator and ICU assistance.
  • USA study:  In 1,122 patients with COVID-19 admitted to hospitals in the USA, it was found that the mortality rate was four times higher in those with diabetes or elevated blood sugar (hyperglycaemia) during the hospital stay (28·8%) than those with normal blood sugar (6·2%). Moreover, mortality was higher in those with hyperglycaemia and without known diabetes than in patients with known diabetes.

How can people with diabetes stay healthy during COVID-19?

Taking medications regularly, eating healthy food, exercising frequently, and regular monitoring of blood sugar levels are the four pillars for effective management of diabetes. This is even more crucial now because they fall under the high-risk category of severe COVID-19 illness. Here are some ways by which diabetic people can keep themselves healthy during this time of pandemic:
  • Take precautions to prevent diabetic ketoacidosis (DKA): COVID-19 can increase the risk of DKA if not controlled and monitored. Signs of DKA include nausea, vomiting, frequent urination, and abdominal pain. So, if your blood glucose level is greater than 240 mg dL in consecutive readings, seeking a doctor consultation to check for ketones is recommended. 
  • Stock up medications: Try to keep a monthly stock of insulin and anti-diabetic medications as it is risky to go out in public places frequently. Make sure your insulin  vials/pens are stored as recommended. Additionally, speak with your doctor to check if you need to keep any medicines handy like paracetamol, antacids, pain-relievers, and medications for nausea, diarrhoea, vomiting, etc. to avoid further complications. 
  • Regular monitoring of blood sugar level: Rapid and high fluctuations in blood sugar levels in a diabetes patient can be serious. Hence, regular monitoring of blood sugar levels is of utmost importance. Diabetes patients should have a glucose monitoring device (glucometer) at home to keep a record of their blood glucose levels.
  • Regular physical activity: Besides a healthy diet and medications, physical activity is equally important in the management of diabetes. At least 150 min of physical activity every week is recommended. This can be split into -  15 min of post-meal walking and light exercise for 30 min every day. Consult your doctor before starting a new regimen.
  • Follow COVID-19 safety guidelines: You should strictly adhere to the social distancing guidelines, wear a face mask every time you step out, and follow hand hygiene to lower the risk of getting infected.
  • Virtual doctor consultation: It may be a better idea to speak with your doctor if you notice any unusual symptoms, or unfamiliar patterns in your blood glucose values. You can opt for an online doctor consultation if you need to discuss your health with your endocrinologist.
 
Book an online doctor consultation for any health-related queries, including the ones on Coronavirus.

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