Table 1 .

Data fields collected in the study including examples for each field.

Data recorded	Examples
Sex	Male, female
Injury side	Left, right, bilateral
Origin of referral	Emergency department, general practice, walk-in centre, other hospital
Age (years)
Diagnosis	Distal radius fracture, both bone forearm fractures, supracondylar elbow fracture, lateral condyle elbow, medial epicondyle elbow, proximal humerus fracture, humeral shaft fracture, slipped upper femoral epiphysis, femoral neck fracture, femoral shaft fracture, distal femur fracture, tibial spine/tibial tubercle fracture, patellar fracture, both bone tibia/fibula shaft fracture, isolated tibial shaft fracture, distal fibula fracture, bimalleollar/trimalleolar ankle fracture, distal tibial physeal fracture (triplane, tillaux etc.)
Date of diagnosis (dd:mm:yyyy)
Time of diagnosis (hh:mm)
Operation type	Manipulation under anaesthesia + Kirschner wires, open reduction internal fixation, intramedullary nailing
Reduction	Closed, open
Grade of primary surgeon	Consultant, registrar, senior house office
Operation date (dd:mm:yyyy)
Operation time (hh:mm)
Additional data fields recorded for supracondylar humeral fractures
Number of wires used	2, 3, or 4
Configuration of wires	Crossed, lateral only
Width of wires	1.6mm, 2mm