Table 3.

Study to Study Comparisons

Studies	Core n/N (%)	Basic AH n/N (%)	Basic Rehab n/N (%)
CENTER-TRACK	17/21 (81%)	40/46 (87%)	41/50 (82%)
CENTER-ADAPT	16/20 (80%)	31/38 (82%)	25/39 (64%)
TRACK-ADAPT	15/20 (75%)	33/38 (87%)	28/39 (72%)

n/N (%): n harmonized/N harmonizable.

For Core, one element is not relevant to ADAPT: (C18658 Employment expanded status). For AH, Eight elements are not applicable to ADAPT (see Supplementary Table S2) as they are not relevant to the study population of pediatric patients with severe traumatic brain injury. For Rehab, 11 elements are not applicable to ADAPT (see Supplementary Table S2) as they are not relevant to the study population of pediatric patients with severe traumatic brain injury.

AH, Acute Hospitalized; CENTER-TBI, Collaborative European NeuroTrauma Effectiveness Research in Traumatic Brain Injury; TRACK-TBI, Transforming Research and Clinical Knowledge in Traumatic Brain Injury; ADAPT, Approaches and Decisions in Acute Pediatric Traumatic Brain Injury.