Table 2 Radiologist findings and agreement for radiograph and MRI
From: Radiographs in screening for sacroiliitis in children: what is the value?
Frequency (%) | ||||||
|---|---|---|---|---|---|---|
Rater 1 | Rater 2 | Rater 3 | Rater 4 | Rater 5 | Kappa (95% CI) | |
Radiograph | ||||||
Global impression of sacroiliitis | 8 (1) | 8 (13) | 27 (45) | 17 (28) | 25 (42) | 0.34 (0.19–0.52) |
Erosion | 7 (12) | 6 (10) | 25 (42) | 12 (20) | 15 (26) | 0.42 (0.22–0.6) |
Sclerosis | 8 (13) | 8 (13) | 21 (35) | 19 (32) | 32 (53) | 0.35 (0.19–0.52) |
Ankylosis | 0 (0) | 0 (0) | 2 (3) | 3 (5) | 4 (7) | – |
JSN | 1 (2) | 1 (2) | 10 (17) | 18 (30) | 8 (13) | 0.11 (0.03–0.2) |
JSW | 7 (12) | 5 (8) | 13 (22) | 10 (17) | 8 (13) | 0.4 (0.23–0.57) |
MRI | ||||||
Global impression of acute/active sacroiliitisa | 12 (20) | 9 (15) | 9 (15) | 10 (17) | 17 (28) | 0.72 (0.52–0.86) |
BME | 10 (17) | 9 (15) | 12 (20) | 10 (17) | 16 (27) | 0.78 (0.58–0.9) |
Capsulitis | 6 (10) | 2 (3) | 0 (0) | 1 (2) | 7 (12) | 0.21 (−0.02–0.46) |
Enthesitis outside of SIJ | 6 (10) | 3 (5) | 1 (2) | 0 (0) | 4 (7) | 0.25 (− 0.01–0.52) |
SIJ effusion | 1 (2) | 3 (5) | 7 (12) | 11 (18) | 17 (28) | 0.19 (0.05–0.34) |
Global impression of structural chronicb lesions consistent with sacroiliitis | 16 (27) | 9 (15) | 12 (20) | 13 (22) | 19 (32) | 0.58 (0.39–0.74) |
Erosion | 14 (23) | 9 (15) | 9 (15) | 13 (22) | 9 (15) | 0.64 (0.48–0.81) |
Sclerosis | 4 (7) | 4 (7) | 6 (10) | 12 (20) | 36 (60) | 0.15 (0.01–0.31) |
Backfill | 11 (18) | 4 (7) | 6 (10) | 4 (7) | 6 (10) | 0.59 (0.24–0.81) |
Fat metaplasia | 3 (5) | 1 (2) | 2 (3) | 1 (2) | 5 (8) | 0.52 (−0.02–0.93) |
Ankylosis | 0 (0) | 1 (2) | 0 (0) | 1 (2) | 1 (2) | – |