“Overweight and obesity were associated with substantially reduced 90 day mortality following incident hospital admission for infection,” the researchers wrote.
They also noted that underweight people were twice as likely to die from infection compared to those at a normal weight. However, they said recent weight loss may have been due to an underlying disease and noted deaths did not increase for underweight patients who had not recently lost weight.
The findings were presented at the European Congress on Obesity in Austria, and three other studies discovered similar results.
Taiwanese researchers found that obese people hospitalized for pneumonia were 20 to 30 percent less likely to die from the illness.
The same team said hospitalized overweight or obese patients were also more than 20 percent less likely to die from sepsis, a blood infection.
Lastly, Dutch researchers revealed that seriously ill patients, who were obese, were less likely to undergo rapid muscle wasting.