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

Table 2.

Number of experimentsand air leakage rate (%) for each mask size by facial shape

Mask Size

S-size M-size

n Average SE n Average SE

Facial Shape Small face 90 34.5 3.6 100 16.1 1.6
Medium face 38 10.3 1.6 50 17.1 2.3
Large face 50 15.5 1.9 50 12.6 1.8

SE: Standard Error