Chronic non-specific low back pain is assumed to be a multi-factorial affliction, implying that a number of different risk factors contribute to its development and persistence. After onset, prognostic factors can potentially predict the future course. Risk factors for the development of chronic pain (i.e. transition from acute to chronic pain) are well documented in the literature. However, when pain becomes persistent, less knowledge is available on the risk factors for future outcome. Incr...