Jazani Reza Khani, Seyedmehdi Seyed Mohammad, Kavousi Amir, Javazm Somaye Tahernezhad
School of Health, Safety and Environment, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Tanaffos. 2018 Oct;17(4):257-263.
Health care workers are at a high risk of exposure to infectious diseases spread by airborne transmission. N95 respirators are the most common respirators used in the health care system and negligence in using them may cause health problems. Hence, more emphasis should be on ergonomic aspects of this mask. This study aimed to develop a tool for ergonomic evaluation of these respirators.
After reviewing previous studies and employees' problems in the use of the N95 respirators, 50 questionnaires were designed and their validity was assessed. Then, the questionnaire was completed by 290 staff members of Masih Daneshvari Hospital and its internal consistency and reproducibility were investigated using Cronbach's alpha coefficient and test-retest method, respectively. Confirmatory factor analysis was used to assess its consistency and internal consistency (construct validity).
With the confirmation of the face and content validities, internal consistency (0.89) calculated by the Cronbach's alpha coefficient and reproducibility of the questionnaire (0.997; p<0.001) assessed by using the ICC Index, were approved. Following examining internal consistency and stability, the questionnaire convergent construct validity was also confirmed using confirmatory factor analysis.
The questionnaire contained 42 items and it is beneficial to use it in the health care system to evaluate the ergonomic problems of the respirators and to have optimal choice in this respect. Also, it can be used in the promotion of the staffs' behavior in wearing these respirators when necessary.
医护人员面临通过空气传播感染疾病的高风险。N95口罩是医疗系统中最常用的口罩，使用不当可能会导致健康问题。因此，应更加重视这种口罩的人体工程学方面。本研究旨在开发一种用于评估这些口罩人体工程学的工具。
在回顾以往研究以及员工使用N95口罩时遇到的问题后，设计了50份问卷并评估其有效性。然后，玛希·达内什瓦里医院的290名工作人员完成了问卷，并分别使用克朗巴赫α系数和重测法对其内部一致性和可重复性进行了调查。采用验证性因素分析来评估其一致性和内部一致性（结构效度）。
经面部和内容效度确认，通过克朗巴赫α系数计算的内部一致性（0.89）以及使用ICC指数评估的问卷可重复性（0.997；p<0.001）均得到认可。在检验内部一致性和稳定性之后，通过验证性因素分析也确认了问卷的收敛结构效度。
该问卷包含42个项目，在医疗系统中使用它有助于评估口罩的人体工程学问题并在这方面做出最佳选择。此外，它还可用于促进员工在必要时佩戴这些口罩的行为。
