Association of occupational and substance use factors with burnout among urban transit operators.

Burnout is a special type of prolonged occupational stress that is linked with numerous psychosomatic and psychological sequelae and negative job consequences. The purpose of this study is to estimate the contribution of occupational and substance use factors to burnout among a multiethnic sample of urban transit operators (n = 1231). Survey and medical exam data were obtained from participants in the 1993-1995 San Francisco MUNI Health & Safety Study. Burnout was measured with the Maslach Burnout Inventory emotional exhaustion subscale. Occupational factors included frequency of job problems (e.g., equipment, passengers, and traffic), years driving, full or part-time work status, and ergonomic problems (e.g., adjusting the seat, back support, vibration, and rocking or bouncing of seat). Substance use measures were alcohol consumption and smoking status (i.e., current, former, and never smokers). The results of multivariable linear regression analysis showed that job problems (beta = 0.426, p < 0.001), ergonomic problems (beta = 0.138, p < 0.001), and full-time work status (beta = 0.070, p < 0.01) were associated with burnout. Smoking was not significant, but alcohol consumption was positively associated with burnout (beta = 0.067, p < 0.01). Age was negatively correlated with burnout (beta = -0.106, p < 0.001), which may reflect a healthy worker effect. Because aspects of the psychosocial and physical work environments can be modified, the findings have important implications for the prevention of burnout among municipal transit operators.