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The role that the secondary gain of work-related back pain plays in the length of disability is an issue that has been debated for years without absolute resolution. This article compares the disability period of lumbar sprain/strain and operated back cases in employees injured on duty and off duty. The patients injured on duty had a statistically significantly longer period of disability than those injured off duty, even when the cases were matched for gender and type of injury.
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SANDER et al. (1986) studied this question.
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