Skip to main content

Table 3 Comparison of MSU crystal deposits at different regions and serum uric acid in patients grouped by ASDAS scores

From: Monosodium urate crystal deposition associated with the progress of radiographic grade at the sacroiliac joint in axial SpA: a dual-energy CT study

 

ASDAS scores

x 2 /Z/F

p

 

ASDAS < 1.3 (n = 38)

1.3 ≤ ASDAS < 2.1 (n = 38)

2.1 ≤ ASDAS ≤ 3.5 (n = 50)

ASDAS > 3.5 (n = 60)

MSU crystallization (+/-) (n)#

 Left sacroiliac joint

8/30

6/32

16/34

27/33

11.451

0.010

 Right sacroiliac joint

3/35

4/34

11/39

36/24

43.684

<0.001

 Hip joint

15/23

16/22

22/28

22/38

0.676

0.879

 Pubic symphysis

11/27

13/25

18/32

21/39

0.549

0.908

Volume of MSU crystallization (cm3)$

 Left sacroiliac joint

0.21 ± 0.62

0.14 ± 0.47

0.49 ± 1.34

0.23 ± 0.57

9.198

0.027

 Right sacroiliac joint

0.04 ± 0.18

0.13 ± 0.52

0.35 ± 1.09

0.57 ± 1.62

34.607

<0.001

 Total volume at pelvis

2.41 ± 6.51

2.69 ± 5.04

7.40 ± 11.49

4.13 ± 7.77

10.517

0.015

Serum uric acid (μmol/L)&

321.0 ± 100.4

326.2 ± 104.2

397.9 ± 109.4

382.9 ± 99.8

6.322

<0.001

  1. Values are given as the numbers or the mean ± standard deviation (Mean±SD)
  2. ASDAS Ankylosing Spondylitis Disease Activity Score, MSU monosodium urate
  3. #Pearson chi-square (x 2) test
  4. $Kruskal-Wallis rank-sum test
  5. &One-way analysis of variance (ANOVA)