Abstract
To ensure the quality of medical care provided by hospitals, it is necessary to maintain and improve the level of job satisfaction among physicians. In this study, we analyzed the relationship between physicians' job satisfaction and various factors of their working styles using data from the 2nd Physician Survey of the "Study on the Actual Conditions and Future Ideal Working Styles of Doctors at Saiseikai Hospitals " in 2021. The survey was a self-administered, anonymous questionnaire survey completed by 1,468 full-time physicians at 76 hospitals, with a response rate of 35.0%.
A CART regression tree was created using physicians' overall satisfaction with their workplace as the objective variable and almost all variables other than satisfaction as explanatory variables; sex, age, number of beds and physicians at the hospital, and various factors related to the way physicians work. The results showed that physician fatigue, physicians' own physical and mental anxiety, sleepiness, and physicians' high
stress levels had a significant impact on satisfaction, while objectively ascertainable indicators such as the number of physicians and beds at the hospital, work hours and work style, commuting time, sleep duration, and exercise habits had little direct impact.
To increase the overall satisfaction of the Saiseikai physicians with their workplaces, attention should first be paid to reducing the accumulation of fatigue among physicians. Furthermore, assistance may be needed for physicians who have high levels of anxiety about their own physical and mental health and for those with a heavy burden of caring for their families.
https://ror.org/01w5vp368 
