Respirator testing in non-clinical settings: II. Global subjective questions.
Harber-P; Wald-M; Beck-J; Hsu-P; Brown-C
NIOSH 1992 Jan; :1-10
A pilot study of respirator users evaluated the nature of subjective responses. Twenty-four workers participated: each classified himself as relatively intolerant (INT) or tolerant (TOL) as a global assessment. A series of specific symptoms was then evaluated using visual analog scales. There were tendencies for the average subjective rating for each symptom to be higher in the INT than the TOL group. In addition, load scaling sensitivity, a measure of an individual's psychophysical resistance sensitivity, tended to be greater in the intolerant workers. Factor analysis demonstrated that the subjective information was separable into a series of distinct factors. This preliminary study implies that a simple question about tolerance is valid and may be useful in selecting respirator users for more detailed medical evaluation. It also suggests that in research studies comparing alternative respirator designs, subjective responses should be recorded along multiple axes, not simply with a single subjective variable.
Respirators; Respiratory-protective-equipment; Personal-protective-equipment; Questionnaires; Workers; Tolerance-threshold; Medical-screening; Equipment-design; Psychophysiology
University of California, Department of Medicine, Occupational Medicine Branch, Los Angeles, CA 90024-7027
Final Grant Report
National Institute for Occupational Safety and Health
University of California, Department of Medicine, Occupational Medicine Branch, Los Angeles, California