Inter- and intra-rater reliability of vertebral fracture classifications in the Swedish fracture register

Table 1 Rater experience level and time between the test occasions

	Experience level	Time between first and second test for cervical fractures	Time between first and second test for thoracolumbar fractures
Rater 1	Senior consultant in orthopaedics and spine surgery as well as responsible for the vertebral fracture classification in the Swedish Fracture Register.	1 mo	7 mo
Rater 2	Senior consultant in orthopaedics and spine surgery.	1 mo	7 mo
Rater 3	Specialist in orthopaedics.	7 mo
Rater 4	Resident in orthopaedics.	7 mo
Rater 5	Medical student, trained by Rater 1 to be knowledgeable on the topic.	1 mo	1 mo
Rater 6	Resident in orthopaedics.		1 yr
Rater 7	Resident in emergency medicine.		1 yr

Raters 1, 2 and 5 were actively working with classifications and vertebral fractures in the time between the tests while Raters 3, 4, 6 and 7 were not.