Surgical Mask vs N95 Respirator for Preventing Influenza Among Health Care Workers A Randomized Trial
Results Between September 23, 2008, and December 8, 2008, 478 nurses were assessed for eligibility and 446 nurses were enrolled and randomly assigned the intervention; 225 were allocated to receive surgical masks and 221 to N95 respirators. Influenza infection occurred in 50 nurses (23.6%) in the surgical mask group and in 48 (22.9%) in the N95 respirator group (absolute risk difference,−0.73%;95%CI,−8.8% to 7.3%; P =.86), the lower confidence limit being inside the noninferiority limit of −9%.
Reference:Loeb M. JAMA 2009;302(17) publish online.
Posted by : insulin , Date : 2009-10-01 , Time : 23:54:07 , From IP : 172.29.9.172
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