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A study conducted by British researchers from the London School of Hygiene and Tropical Medicine and published on site medRxiv That there are 7,000 toxic chemicals that tobacco smoke contains in human lungs, including 70 cancer-causing substances, which restricts smoker’s lung choking and its ability to resist the emerging corona virus, through chronic pulmonary embolism and bloating and acute and rapid inflammation in the respiratory system, contributes to failure to achieve a safe level of oxygen in the blood.
The study showed that patients admitted to hospital due to Corona virus were less likely to be current smokers than patients who had been admitted with other types of respiratory viral infection last year (2019).
The researchers also found the prevalence of smoking among patients who were hospitalized due to Corona COVID-19 It was much lower than one would expect from the general local population.
Smoking and hospitalization opportunities
The study indicated that after a review of 279 studies, it was found that current smokers were less likely to test positive for Corona virus than people who had never smoked, while former smokers were more likely to develop serious illness and hospitalization compared to non-smokers.
What did the researchers do?
In a retrospective case-control study conducted in a hospital NHS In London, the team examined the relationship between past and current smoking and hospitalization for CoronaCOVID-19 Comparison with hospitalization for other respiratory virus infection in the previous year.
The study involved 446 Corona hospitalized patients COVID-19 (Cases) where data was obtained between March 1, 2020 and August 26, 2020 and these patients were compared with 211 patients who were admitted with other respiratory viral infections, as data were obtained between January 1, 2019 and 31 December 2019.
What did the study find?
Corona patients, in hospital, were 45% less likely to be current smokers than patients who had been admitted with another respiratory viral infection in the previous year, as no significant difference was observed in the odds of being a former smoker between the two groups.
Current smoking prevalence among cases was significantly lower than expected based on age and local gender-matched smoking prevalence at 9.4% versus 12.9%.
To better understand the role of smoking as a risk factor for hospitalization, the team says, representative population-wide longitudinal studies from multiple sites are needed.
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