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Several retrospective studies have demonstrated improved outcomes among patients with community-acquired pneumonia (CAP) who are taking statins. Some researchers believe that these medications not only lower serum cholesterol levels but also may produce beneficial anti-inflammatory and immunoregulatory effects. However, others have argued that these potential benefits can be explained by the “healthy-user” effect — i.e., that being on a statin is a marker for better health and improved access to healthcare.
To examine this issue, researchers performed a prospective observational study of consecutive patients admitted to an Edinburgh, Scotland, hospital with CAP between January 2005 and November 2007 (n=1007). The patients’ use of statins and…