Table 7 Correlation between plasma calprotectin and imaging features (US* and MRI**)
Variables | n | Mean | Median | Standard deviation | p value | |
|---|---|---|---|---|---|---|
US enthesitis | Negative | 17 | 50.41 | 25.86 | 86.66 | 0.746 |
Positive | 16 | 27.90 | 24.73 | 17.02 | ||
US synovitis Mode B | Negative | 10 | 29.21 | 20.48 | 22.58 | 0.292 |
Positive | 13 | 31.78 | 26.54 | 15.81 | ||
US tenosynovitis Mode B | Negative | 17 | 32.54 | 26.09 | 19.60 | 0.327 |
Positive | 6 | 25.36 | 19.51 | 15.83 | ||
US tenosynovitis Power Doppler | Negative | 22 | 31.37 | 25.98 | 18.74 | – |
Positive | 1 | 15.14 | 15.14 | – | ||
Negative for sacroiliitis | 20 | 47.06 | 26.40 | 79.93 | ||
MRI | Positive for sacroiliitis | 10 | 31.47 | 26.31 | 20.60 | 0.842 |
Chronic sacroiliitis | 6 | 26.77 | 23.78 | 14.56 | ||