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Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis

Jeffrey D. Smith, Colin C. MacDougall, Jennie Johnstone, Ray A. Copes, Brian Schwartz and Gary E. Garber
CMAJ May 17, 2016 188 (8) 567-574; DOI: https://doi.org/10.1503/cmaj.150835

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  • Figure 1:
    Figure 1:

    Selection of studies for the meta-analysis.

  • Figure 2:
    Figure 2:

    Results of meta-analysis to determine effectiveness of N95 respirators versus surgical masks in protecting health care workers against acute respiratory infection. Outcomes were (A) laboratory-confirmed respiratory infection, (B) influenza-like illness and (C) workplace absenteeism. Values less than 1.0 favour N95 respirator. CI = confidence interval, NA = not applicable, RCT = randomized controlled trial.

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Canadian Medical Association Journal: 188 (8)
CMAJ
Vol. 188, Issue 8
17 May 2016

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Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis
Jeffrey D. Smith, Colin C. MacDougall, Jennie Johnstone, Ray A. Copes, Brian Schwartz, Gary E. Garber
CMAJ May 2016, 188 (8) 567-574; DOI: 10.1503/cmaj.150835
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