World Journal of Nursing Research

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Comparison of Rates of Air Leakage Due to Differences in Face Shape and Mask Size

Table 4.

Comparison of airleakage rate (%) for different combinations of facial shape and mask size


□	n	□	Average	□	SE	□	P-value	□	Multiple Comparisons

Small face _S-size mask(a)	90	□	34.5	□	3.6	□		□	(a)>(b)***
Small face _M-size mask(b)	100	□	16.1	□	1.6	□		□	(a)>(c)***
Medium face _S-size mask(c)	38	□	10.3	□	1.6	□	<0.001***	□	(a)>(d)***
Medium face _M-size mask(d)	50	□	17.1	□	2.3	□		□	(a)>(e) ***
Large face _S-size mask(e)	50	□	15.5	□	1.9	□		□	(a)>(f)***
Large face _M-size mask(f)	50	□	12.6	□	1.8	□		□	□

SE: Standard Error; One-Way Analysis of Variance (ANOVA); ***：p<0.001