Fig. 4From: The effectiveness of trauma care systems at different stages of development in reducing mortality: a systematic review and meta-analysisMortality rates for different subgroup analysis at different stages of trauma system development. 1 Trauma centre and mortality rate for older paediatric’ patients (≤ 18 years). 2 Trauma system implementation/maturation and road trauma mortality. 3 Trauma system implementation/maturation and mortality for severely injured patients (ISS > 15)Back to article page