Table 4.

Comparison of capillary blood gas analysis between N95 mask and surgical mask

	Surgical mask	N95 mask	p
pH, mean ± SD	7.43 ± 0.03	7.48 ± 0.04	< 0.001*
pCO2, mean ± SD	37.33 ± 8.81	28.46 ± 7.77	< 0.001*
HCO3, mean ± SD	24.92 ± 2.86	23.73 ± 3.29	0.131
BEb, median (Q1−Q3)	1.40 (− 3.90–3.10)	− 2.68 (− 4.50–1.20)	0.039*
LAC, mean ± SD	1.91 ± 0.61	1.74 ± 0.68	0.314

Paired t test, α: 0.05

*Statistical significance

^bWilcoxon test