Several factors increase the risk of developing job burnout, with job strain being one of the most significant contributors. Demographically, burnout is more prevalent among older workers (ages 55–64), those who are unmarried, and individuals in manual labor positions. Lifestyle and health issues, such as heavy alcohol use, physical inactivity, being overweight, and pre-existing physical or mental disorders, are also linked to job burnout. Furthermore, there is a strong co-occurrence with depression; a major study found that half of employees with severe burnout also suffered from a depressive disorder. A key precipitating factor is the perception of an effort-reward imbalance, where an individual feels they invest significant time and energy into their work but receive little in return, such as low pay or lack of respect and support.