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Table 1 Prevalence of classification for two, six and eight subcategories for each of the five raters

From: Categorisation of lumbar spine MRI referrals in Denmark as compliant or non-compliant to international imaging guidelines: an inter-rater reliability study

  Rater 1 Rater 2 Rater 3 Rater 4 Rater 5
Two categories: n (%) n (%) n (%) n (%) n (%)
 Inappropriate referrals for MRI 41 (82) 40 (80) 39 (78) 40 (80) 42 (84)
 Appropriate referrals for MRI 9 (18) 10 (20) 11 (22) 10 (20) 8 (16)
Six subcategories n (%) n (%) n (%) n (%) n (%)
Inappropriate referrals for MRI
 1 No information on previous treatment and duration 41 (82) 40 (80) 39 (78) 40 (80) 42 (84)
Appropriate referrals for MRI
 2 Fracture 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 3 Cancer, infection, immunosuppression or spondylarthritis 5 (10) 5 (10) 6 (12) 5 (10) 4 (8)
 4 Persistent/progressive symptoms after six weeks of treatment 0 (0) 2 (4) 1 (2) 1 (2) 0 (0)
 5 Prior lumbar surgery and new or progressing symptoms 4 (8) 3 (6) 4 (8) 4 (8) 4 (8)
 6 Cauda equina syndrome / progressive neurologic deficit 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
Eight subcategories: n (%) n (%) n (%) n (%) n (%)
Inappropriate referrals for MRI
 1 No information on previous treatment 23 (46) 24 (48) 20 (40) 25 (50) 26 (52)
 2 No information on duration of previous treatment 18 (36) 16 (32) 19 (38) 15 (30) 16 (32)
 3 Other reasons 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
Appropriate referrals for MRI
 4 Fracture 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
 5 Cancer, infection, immunosuppression or spondylarthritis 5 (10) 5 (10) 6 (12) 5 (10) 4 (8)
 6 Persistent/progressive symptoms after six weeks of treatment 0 (0) 2 (4) 1 (2) 1 (2) 0 (0)
 7 Prior lumbar surgery and new or progressing symptoms 4 (8) 3 (6) 4 (8) 4 (8) 4 (8)
 8 Cauda equina syndrome / progressive neurologic deficit 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
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