Persisting symptoms, quality of life and return to work following mTBI in an Australian community-based cohort: results from the Concussion Recovery Study (CREST) (22213)
Background: Some people experience persisting post-concussion symptoms (PPCS) for months or years after mild traumatic brain injury (mTBI). Our aim was to evaluate the presence of PPCS, impact on quality of life (QoL) and ability to return to work (RTW) at 3- and 12-months after mTBI in an Australian population.
Methods: Prospective, longitudinal cohort study of adults aged 18-65 years who sustained mTBI from a range of mechanisms. Demographic, pre- and peri-injury data were collected by telephone within seven days of injury. Primary outcome measures were PPCS (Post-Concussion Symptom Scale symptom severity score >6 for males; >7 for females), health-related QoL (QOLIBRI-OS); and RTW at 3- and 12-months post-mTBI.
Findings: 232 participants, median age 33y (IQR 24-50y), 101(43.5%) female, 74(31.9%) sports-related mTBI, were included in analysis. Of 164(70.7%) participants completing 3-month follow-up, 81(49.7%) had PPCS. At 3-months median QOLIBRI-OS score was 87.5% (IQR 67-96). Of those working pre-injury, 131(95.6%) had RTW. Notably, 59(43.1%) of people who had RTW at 3-months had PPCS. At 12-months, 137(59.1%) people completed follow-up; 62(45.3%) were experiencing PPCS and median QOLIBRI-OS score was 88.0% (IQR 71-96). Of those working pre-injury, 109(94.8%) had RTW, with 38.3% working with a degree of PPCS.
Interpretation: Of those participants who completed follow-up, almost half reported experiencing persisting symptoms at 12 months after mTBI. Over a third of participants continue to work while symptomatic. Outcomes for those lost to follow-up are unknown, representing potential response bias. Further investigation into the social, financial and economic burden of PPCS is warranted.