Predictors of 12 month functional outcomes and length of stay of severely injured children in NSW, Australia. A longitudinal multi-centre study

•The longer a child remains in hospital, the poorer their psychological and physical outcomes.•While the parent proxy rating of the child's health improved at 12 months, it still had not returned to baseline.•Inpatient psychosocial care and early family and patient-centred rehabilitation could improve emotional wellbeing. The majority of paediatric injury outcomes studies focus on mortality rather than the impact on long-term quality of life, health care use and other health-related outcomes. This study sought to determine predictors of 12-month functional and psychosocial outcomes for children sustaining major injury in NSW. The study included all children < 16 years requiring intensive care or an injury severity score (ISS) ≥ 9 treated in NSW at a paediatric trauma centre (PTC). Children were identified through the three PTCs and NSW Trauma Registry. The paediatric Quality of Life Inventory (PedsQL) and EuroQol five-dimensional EQ-5D-Y were used to measure HRQoL post-injury, completed via parent/carer proxy recruited through NSW PTCs. There were 510 children treated at the three NSW PTCs during the 15-month study period. The mean (SD) age was 6.7 (6.0) years, with a median NISS (New Injury Severity Score) of 11 (IQR: 9–18). Regression analysis showed worse psychosocial health at twelve months was associated with hospital length of stay (LoS) and number of body regions injured (F2,65 = 5.85, p = 0.005). Physical outcome was associated with LoS and intensive care unit (ICU) admission (F2,66 = 13.48, p