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Updated: Feb 3, 2026

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
Published on: April 3, 2018
[Study on the relationship between fit of dust respirator and head-face dimensions of dust-exposed workers in a
1Preventive Medicine Clinic Department (Occupational Health Section) , Luzhou City Disease Prevention and Control Center, Luzhou 646000, China.
Abstract:
Objective: To investigate the relationship between the fit of dust respirator and the head-face dimensions of dust-exposed workers, thereby facilitating the selection of suitable protective respirator for such personnel. Methods: In July 2023, a total of 300 dust-exposed workers at a construction site were selected as research subjects by cluster sampling. The Artec EVA handheld 3D scanner and its software were used to measure 21 head-face dimensions indices. Each subject underwent fit test with one foldable and one cup-shaped respirator. The relationship between head-face dimensions and respirator fit was analyzed using chi-square tests and multivariate logistic regression. Results: A total of 600 fit tests were conducted among the 300 dust-exposed workers, with an overall pass rate of 23.50% (141/600) . Pass rates differed significantly between respirator types: cup-shaped respirator (36.00%, 108/300) higher than foldable respirator (11.00%, 33/300) , and the difference was statistically significant (χ(2)=52.15, P<0.001) . The overall coverage rate of head-face dimension classification was 75.00% (225/300) . There was a statistically significant difference in the pass rate of fit test for cup-shaped respirator among different classification groups (χ(2)=18.92, P<0.05) . Multivariate logistic regression revealed that body mass index (BMI, OR=1.08, P<0.05) , morphological face length (OR=1.58, P<0.05) , nasal width (OR=2.57, P<0.05) , and respirator shape (OR=5.27, P<0.05) were primary factors influencing respirator fit. Conclusion: The key factors influencing respirator fit include BMI, morphological face length, nasal width, and respirator shape. Occupational groups are advised to undergo fit test before initial use of dust respirator.
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