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Table 2 Results of FiO2, EtCO2, and RR with or without a surgical mask

From: Effects of wearing surgical masks on fraction of inspired oxygen in spontaneously breathing patients: improving safety for frontline healthcare professionals under pandemic situations

 

Mean (SD)

Mean difference (95% CI)

P

 

With a mask

Without a mask

  

FiO2

0.56 (0.15)

0.67 (0.08)

0.11 (0.095–0.125)

< 0.0001

EtCO2

34.4 (5.9)

26.3 (7.0)

8.1 (7.2–8.9)

< 0.0001

RR

13.7 (4.4)

13.4 (4.1)

0.31(−1.52 ~ 0.89)

0.19

  1. P-values from repeated measures analysis of variance (ANOVA)
  2. FiO2 fraction of inspired oxygen, EtCO2 end-tidal CO2, SD standard deviation, CI confidence interval, RR respiratory rate
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BMC Anesthesiology

ISSN: 1471-2253

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