Page 57 - SPONDYLOARTHRITIS IN COLOMBIA -

Table 1. Comparison of demographic and SpA disease characteristics according to SI-MRI-ordered status (n=581)
SI-MRI ordered Yes
Explanatory variables n=137 n=444 p-value
SI-MRI ordered No
Male gender, (%)
Age at assessment, (years)*
Age symptom onset (≤35 yrs) (%)*
Symptoms at presentation (%)* Arthritis
Enthesitis
Back pain
Butock pain Several symptoms
Disease duration (≤5 years) (%)
Chronic back pain, (%) IBP, (%)
Buttock pain, (%) Arthritis, (%) Enthesitis, (%) Dactyilitis, (%)
Uveitis, (%) Psoriasis, (%) Infection history, (%) BASFI (≥4) (%)*
BASDAI (≥4) (%)*
ASDAS CRP high (≥2.1) (%)* ASDAS ESR high (≥2.1) (%)* CRP (≥5mg/dl) (%)*
ESR (≥20 mm/hr) (%)*
Diagnostic subtype (%) Ankylosing spondylitis Undifferentiated SpA Reactive arthritis Psoriatic arthritis
IBD
Number of SpA features Number of criteria met
87 (63.5)
33.5 ± 11.8 (n=136) 115 (83.9) (n=133)
32 (23.4) 8 (5.8) 43 (31.4) 4 (2.9) 48 (35) (n=136) 52 (37.9) (n=131) 123 (89.8) 88 (64.2) 48 (35) 88 (64.2) 97 (70.8) 21 (15.3) 10 (7.3) 2 (1.5) 36 (26.3) 103 (75.2) (n=127) 113 (82.4) (n=127) 111 (81) (n=80) 125 (91.2) (n=84) 12 (8.8) (n=81) 86 (62.8) (n=84)
44 (32.1) 70 (51.1) 20 (14.6) 2 (1.5)
1 (0.7) 2.2 ± 1.1 2.18 ± 0.8
330 (74.3) 0.01
34.9 ± 12.2 0.46 (n=329)
365 (82.2) 0.64 (n=329)
173 (38.9) 24 (5.4) 180 (40.5) 5 (1.1) 58 (13.1) (n=335)
≤0.001
123 (27.7) 0.02
(n=332)
316 (71.1)
170 (38.2)
124 (27.9) 0.11 331 (74.5) 0.01
235 (52.9)
63 (14.1) 0.74
25 (5.6) 0.47
25 (5.6) 0.04 174 (39.2) 0.006 369 (83.1) 0.03
(n=239)
370 (83.3) 0.81
(n=239) 434 (97.7) (n=59)
≤0.001
412 (92.8) 0.47
(n=162) 143 (32.2) (n=97) 364 (81.9) (n=218)
≤0.001 ≤0.001
125 (28.1) 0.001 160 (36)
136 (30.6) 19 (4.3) 4 (0.9)
1.9 ± 1.1 0.18 2.05 ± 0.9 0.64
≤0.001 ≤0.001
≤0.001
Values are mean ± SD for continuous variables or percentages for categorical variables, unless otherwise specified. p- values were calculated using t-test adjusted for unequal variances for comparison of continuous variables and Chi square test for categorical variables.
IBP, inflammatory back pain, CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; IBD, SpA associated to Inflammatory Bowel Disease; SI-MRI, sacroiliac joints magnetic resonance imaging; BASFI, Bath Ankylosing Spondylitis Functional Index; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; ASDAS, Ankylosing Spondylitis Disease Activity Score.
* Variables with missing data, n means the number of patients in which these variables are based.
55