Overall, the use of air filters is associated with fewer symptoms among patients with allergies and asthma, according to a literature review reported in the December issue of Chest. Ellen McDonald, RN and colleagues from McMaster University, Hamilton, Ontario, Canada, systematically reviewed the evidence of 10 randomized trials evaluating the effects of air filtration systems on asthmatic patients.
They abstracted data on the methodolgic quality, population, intervention, and outcomes from studies identified using MEDLINE, the Cumulative Index to Nursing and Allied Health Literature, and the Cochrane Collaboration.
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