Table 1.

Pulse Rates According to Mask Types

Mask		Base Pulse: Beats/Min	Average Pulse: Beats/Min
		Median (Q1/Q3)	Mean ± SD
Surgical	I	77 (72/83)	112.47 ± 5.96
FFR	II	78 (72/86)	125.26 ± 10.74
Half-face	III	77 (72/87)	142.32 ± 9.21
No-mask	IV	80 (71/88)	109.68 ± 9.50
p Value		0.884	< 0.001
Pairwise comparisons	I→II	ns	< 0.001
	I→III	ns	< 0.001
	I→IV	ns	0.604
	II→III	ns	< 0.001
	II→IV	ns	< 0.001
	III→IV	ns	< 0.001

General linear model repeated analysis of variance (Wilks' Lambda); Post hoc test: Bonferroni, Friedman test (Monte Carlo).

Q1 = 25^th percentile; Q3 = 75^th percentile; SD = standard deviation; FFR = filtering face-piece respirator.