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D. An Association between Back Injury and Job Stress

Narrator: This is Science Today. Job stress has been linked to a higher incidence of back injury. Dr. Niklas Krause, an epidemiologist at the University of California, Berkeley says before, job stress was considered a characteristic of someone's personality - not a cause of injury. With both physical workload and job stress in mind, Krause studied the rate of back injury in bus drivers.

Krause: It's known that they have a very stressful job - you know, they're not just driving a big vehicle but have hundreds of people and safety issues in their mind and have to deal with customers. And we saw that the more problems they had - crime or accidents or fare evasion or trouble with a supervisor - the more injuries they've had.

Narrator: These findings are significant since it proves for the first time factors other than physical workload can be predictors of injury.

Krause: : It's another piece of evidence that will lead to the acceptance as job stress as a risk factor for low back pain at the workplace. So you can not blame the individual of not dealing right with the stress in this case anymore. It doesn't make sense.

Narrator: For Science Today, I'm Larissa Branin.