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) |