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Table 3 Comparison of mean face dimensions between South Africa, Korea and USA

From: Respirator fit of a medium mask on a group of South Africans: a cross-sectional study

Face Dimensions South African
this study
Korean - Kim et al., 2003 American - Oestenstad and Perkins, 1992
  Male
n = 14
Female
n = 15
Male
n = 70
Female
n = 40
Male
n = 38
Female
n = 30
Face width (mm)
Mean (SD)
150.3
(6.6)
141.9
(7.9)
147.6
(5.0)
136.6
(4.9)
139.0
(8.0)
129.0
(6.0)
Face length (mm)
Mean (SD)
117.9
(8.3)
111.7
(6.6)
120.6
(5.9)
109.6
(4.2)
126.0
(7.0)
118.0
(5.0)
Lip width (mm)
Mean (SD)
50.9* 53.5* 49.3
(3.8)
44.1
(3.2)
51.0
(4.0)
48.0
(3.0)
Nose width (mm)
Mean (SD)
41* 40* 36.7
(2.7)
33.2
(1.9)
36.0
(3.0)
33.0
(4.0)