Persistence of Respirator Use Learning

ABSTRACT

Although retraining and repeat fit testing are needed for respirator users, the optimal frequency is uncertain. The persistence of proper respirator donning/doffing techniques and changes in quantitative fit factor over six months after initial training were measured in this study. Initial training was designed for rapid rollout situations in which direct contact with well-trained occupational health professionals may be infeasible. METHODS: Subjects (n = 175) were assigned randomly to use either a filtering facepiece N95 (FFR) or dual cartridge half facemask (HFM) respirator. Each was assigned randomly to one of three training methods-printed brochure, video, or computer-based training. Soon after initial training, quantitative fit and measures of proper technique were determined. These measurements were repeated six months later. In the six-month follow-up, subjects were randomized to receive either a brief reminder card or a placebo card. RESULTS: Total performance score, major errors, and quantitative fit all became significantly worse at six months. An individual's result soon after training was the most important predictor of performance six months later. There was a marginal not statistically significant tendency for those initially trained by video to have better protection six months later. IMPLICATIONS: The study suggests that persons who use respirators intermittently should be thoroughly retrained and reevaluated periodically.