| | |
Correlation coefficient ( P-value)
|
|---|
| | |
All patients
|
<4 years
|
≥4 years
|
|---|
|
Baseline1
|
BASDAI versus SIJ
|
−0.1 (0.3)
|
0.1 (0.3)
|
−0.3 (0.02)
|
| |
BASDAI versus CRP3
|
0.04 (0.8)
|
0.1 (0.7)
|
−0.1 (0.8)
|
| |
BASFI versus SIJ
|
−0.04 (0.7)
|
0.2 (0.2)
|
−0.3 (0.1)
|
| |
BASFI versus CRP3
|
−0.2 (0.2)
|
−0.2 (0.4)
|
−0.2 (0.6)
|
| |
SIJ versus CRP3
|
−0.4 (0.01)
|
−0.5 (0.005)
|
0 (0.995)
|
|
Differences2
|
BASDAI versus SIJ
|
0.2 (0.1)
|
0.4 (0.01)
|
0.12 (0.5)
|
| |
BASDAI versus CRP3
|
0.4 (0.02)
|
0.5 (0.01)
|
0.22 (0.4)
|
| |
BASFI versus SIJ
|
0.1 (0.3)
|
0.4 (0.01)
|
0.1 (0.7)
|
| |
BASFI versus CRP3
|
0.1 (0.5)
|
0.3 (0.2)
|
0.03 (0.9)
|
| |
SIJ versus CRP3
|
0.4 (0.02)
|
0.04 (0.9)
|
0.8 (0.01)
|
- 1Spearman correlation coefficient. 2Partial Spearman correlation coefficients of differences adjusted for the baseline status of the corresponding parameters. 3CRP-positive patients. BASDAI, Bath ankylosing spondylitis disease activity index; BASFI, Bath ankylosing spondylitis functional index; BASMI, Bath ankylosing spondylitis metrology index; ASDAS, ankylosing spondylitis disease activity score; CRP, C-reactive protein; SIJ, sacroiliac joint assessment on MRI.
