September 27, 2011
Asthma Patients are less likely to die from Swine Flu
(Ivanhoe Newswire) -- People with asthma who are admitted to hospital with pandemic influenza H1N1 (swine flu) are half as likely to die or require intensive care than those without asthma, according to this study.
The study found that, despite asthma being among the commonest illnesses seen in patients admitted to hospital with H1N1, people with the condition had less severe outcomes.In general, people with asthma are at risk of developing breathing difficulties when they have an infection, such as H1N1. When the lungs of people with asthma are infected with a virus, mucus and cells move into the narrow airways. This blocks the free movement of air.
The researchers studied 1,520 patients who were admitted to 75 hospitals in 55 cities and towns in the UK with the H1N1 virus. 480 (31%) of the people studied were aged under 16 yrs old. Asthma was the most common illness, affecting 385 (25%) of all patients.
The results showed that people with asthma and H1N1 more often had shortness of breath, more need for supplemental oxygen and greater severe respiratory distress than patients with H1N1 who did not have asthma. However, overall, people with asthma were half as likely to die or require high dependency or intensive care in hospital.
The link between asthma and less severe outcomes was seen even after the researchers took into account age, presence of other illnesses, and both antiviral and antibiotic use. What did seem to make a difference was that patients with asthma came to hospital earlier in the course of their H1N1 disease than other patients with flu. Also, those patients with asthma who had less severe outcomes were on regular inhaled steroids at the time of hospitalization and received further steroids on admission.
SOURCE: European Respiratory Society's Annual Congress held in Amsterdam on September 26, 2011