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Multi-level modelling of employment probability trajectories and employment stability at 1, 2 and 5 years after traumatic brain injury

Abstract Primary objectives: To examine trajectories of employment probability and stability over the first 5 years after traumatic brain injury (TBI) by using multi-level modelling and multinomial logistic regressions. Research design: A longitudinal cohort study. Methods and procedures: One hundred and five individuals with moderate-to-severe TBI who had been admitted to the Trauma Referral Centre for the Southeast region of Norway were followed up at 1, 2 and 5 years after the injury. Main outcomes and results: Employment status was dichotomized into employed and unemployed, while employment stability was categorized into stably employed, unstably employed and unemployed at 1, 2 and 5 years after injury. Being single, unemployment prior to injury, blue collar occupation, lower Glasgow Coma Scale (GCS) score at hospital admission and greater length of post-traumatic amnesia (PTA) were significantly associated with being unemployed at 1, 2 and 5 years post-injury. Further, younger patients, those with a lower GCS, greater length of PTA and greater length of hospital stay were negatively associated with employment stability. Conclusions: It could be wise to target patient population with these demographic and injury characteristics for more extensive follow-ups and vocational rehabilitation to help improve employment outcomes following injury.