Researchers at the University of Texas Medical Branch at Galveston looked at
over 10,000 COVID-19 patients and found that significantly more former smokers ended up in the hospital and died
from COVID-19 than those who still smoked or had never smoked at all.
Smoking can lead to increased risks of
infections and worse outcomes for a range of diseases including pneumonia, tuberculosis, and rhinovirus, among
others, but what about COVID-19? As scientists and medical experts race to learn more about the new disease,
experts at UTMB looked at medical records and smoking habits of thousands of patients and found a surprising
link between the new disease and the hard-to-break habit.
predominantly effects the respiratory system and smokers are at risk of viral infections so we were interested in understanding the impact of coronavirus among smokers,” said Dr. Gulshan Sharma, senior author and
professor and director of the pision of Pulmonary, Critical Care & Sleep Medicine at UTMB.
The team of
doctors and researchers looked at the medical records of 10,216 patients who had tested positive for COVID-19
and provided information about their smoking habits. The majority, about 87 percent, indicated they’d never smoked while about 9 percent were former smokers and 3.9 percent said they were current smokers.
were the group most likely to end up hospitalized or die because of COVID-19, their analysis found. In the past year, medical experts around the world have found that a number of different factors, including age, obesity,
chronic kidney disease, diabetes, cancer, among others, can affect the severity of a COVID-19 infection and the likelihood that an individual will end up in the hospital or die. Despite agreement about the association between
severe COVID-19 and these comorbidities, the relationship between tobacco use and the severity of COVID-19
infection remains controversial, the researchers stated in the paper.
that may be affecting the outcome of these patients is age. The risks of the smoking-related disease result largely from cumulative damage; hence, the consequences of smoking occur disproportionately among the elderly, authors of the study said. In the study, the UTMB researchers estimated that the odds of hospitalization from COVID-19
increased by 6 percent for every year of age in the population studied.
of severe COVID-19 among former smokers is significantly driven by the effect of age and comorbidities,”
said Dr. Puebla Neira, the first author of the study.
In the cohort
the researchers studied, the mean age of former smokers was 10 years older than that of current smokers, and 12
years older than that of never smokers.
should get vaccinated for COVID-19,” Sharma said. “Vaccine hesitant groups among former smokers
should especially be encouraged to get vaccinated to reduce their risk of severe disease.”