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Table 6 Inter-observer reliability of the components of the mSASSS and the extended mSASSS, expressed in variance components

From: Incorporation of the anteroposterior lumbar radiographs in the modified Stoke Ankylosing Spondylitis Spine Score improves detection of radiographic spinal progression in axial spondyloarthritis

 

Cervical spine lateral view

Lumbar spine lateral view

Lumbar spine AP view

Residual variance component

Observer variance component

Patient variance component

Residual variance component

Observer variance component

Patient variance component

Residual variance component

Observer variance component

Patient variance component

Status score at baseline

8.87

0.06

91.07

9.05

0.00

90.95

13.23

0.22

86.55

Status score at year 2

13.71

0.19

86.10

7.49

0.00

92.51

12.14

0.13

87.73

Change score

50.49

0.18

49.33

57.11

0.00

42.89

69.54

0.00

30.46

  1. AP anteroposterior, mSASSS modified Stoke Ankylosing Spondylitis Spine Score