Correlation between Objective and Subjective Evaluations using Salivary Amylase and PMOS when wearing Oxygen Devices

This paper describes the quantitative measurement of stress when wearing an oxygen device. Stress was quantified in two ways. One is objective stress and the other is subjective stress. Furthermore, the relationship between these two stresses was evaluated. As a result, objective stress was significantly increased by wearing an oxygen device. Also, subjective stress was significantly increased in two of five items expressing negative emotions. Regarding the relationship between objective stress and subjective stress, we showed that SAA, which is an index of objective stress, and FI, which represents fatigue of subjective stress, correlated with a correlation coefficient of 0.51. Wearing an oxygen mask increased SAA levels in saliva, suggesting that mask wearers may be feeling stressed. Furthermore, it was shown that the objective stress indicated by salivary amylase may indicate the degree of fatigue. It is thought that a higher degree of stress can be evaluated by combining the objective stress evaluation method and the subjective stress evaluation method.