Table 1. Summary of participating datasets.

Dataset	Study timeframe	Inclusion Criteria	Number of participants	Percentage with multiple injuries	Outcome	Follow-up rate at 12-months
National Study on Costs and Outcomes of Trauma (USA)	Jul 2001–Nov 2002	18–85 years of age, ≥1 Abbreviated Injury Scale injury with a severity score >2	3920	GBDa injury types 61%, ICD-10 body regions 71%	GOS-Eb	83%
					SF-12c	77%
Victorian Orthopaedic Trauma Outcomes Registry (Australia)	Mar 2007–Mar 2011	Admitted to one of four hospitals with an orthopaedic injury >24 hours	15457	GBD injury types 42%, ICD-10 body regions 48%	GOS-Ea	89%
		≥18 years of age			SF-12b	53%
					EQ-5D	62%
Victorian State Trauma Registry (Australia)	Jan 2007–Mar 2011	Injury Severity Score >15, ICU admission >24h, Urgent Surgery	7752	GBD injury types 76%, ICD-10 body regions 88%	GOS-E EQ-5D a	83% 55%
		≥18 years of age			SF-12b	52%
Prospective Outcome of Injury Study (NZ)	Dec 2007–Aug 2009	18–64 years, Accident Compensation Corporation entitlement claim, Admitted to hospital within 7 days of injury	711	GBD injury types 32%, ICD-10 body regions 38%	EQ-5D	80%

^aGBD, Global Burden of Disease study;

^bGOS-E, Glasgow Outcome Scale – Extended;

^cSF-12, 12-item Short Form Health Survey.