The Prevalence of Renal Impairment in Patients with Spondyloarthritis: Results from the International ASAS-COMOSPA Study

2018 ◽  
Vol 45 (6) ◽  
pp. 795-801 ◽  
Author(s):  
Marion Couderc ◽  
Bruno Pereira ◽  
Anna Molto ◽  
Aurélien Tiple ◽  
Martin Soubrier ◽  
...  
Keyword(s):  
Risk Factors ◽  
Ankylosing Spondylitis ◽  
Renal Impairment ◽  
Disease Activity ◽  
Disease Severity ◽  
Disease Duration ◽  
Activity Index ◽  
Univariate Analysis ◽  
Antiinflammatory Drug ◽  
Hla B27

Objective.To assess the prevalence and association of renal dysfunction in patients with spondyloarthritis (SpA).Methods.The ASAS-COMOSPA (Assessment of Spondyloarthritis international Society-COMOrbidities in SPondyloArthritis) was an international study (22 participating countries from 4 continents) investigating comorbidities in SpA. Renal function was assessed based on estimated glomerular filtration rate (eGFR) calculated using the Modification of Diet in Renal Disease equation. SpA characteristics and risk factors for renal impairment were collected. Nonsteroidal antiinflammatory drug (NSAID) use was assessed based on current intake (last 3 mos).Results.Of the 3984 patients recruited, 2098 (52.6%) were analyzed after excluding outliers and patients with no available eGFR measurement [male sex: 63.5%; age: 45.3 yrs; disease duration: 8.6 years; HLA-B27+: 73.1%; Bath Ankylosing Spondylitis Activity Index (BASDAI): 3.6/10]. Overall, 153 patients (5.2%, mean age: 53.6 yrs) exhibited an eGFR < 60 ml/min/1.73 m2. In univariate analysis, renal impairment was associated with age (p < 0.001), HLA-B27 positivity (p = 0.003), several cardiovascular (CV) risk factors (history of hypertension, p < 0.001; systolic blood pressure, p = 0.009; diabetes, p = 0.005; and Framingham risk score, p < 0.001), disease activity scores [BASDAI, p = 0.001; Ankylosing Spondylitis Disease Activity Score-C-reactive protein (ASDAS-CRP), p < 0.001], functional variables (Bath Ankylosing Spondylitis Functional Index, p < 0.001), inflammatory biomarkers (erythrocyte and CRP, both p < 0.001), and NSAID intake since onset of disease (percentage of days, p = 0.008). However, there was no association with disease duration, disease severity, or ASAS-NSAID score. In multivariate analysis, age (45–59 yrs: OR 1.9, > 60 yrs: OR 6.2), HLA-B27 positivity (OR 0.51), and CRP (OR 1.3) remained significantly associated with eGFR < 60 ml/min/1.73 m2.Conclusion.Renal impairment was associated with age, HLA-B27 positivity, and inflammation, though not with CV risk factors, disease severity, or NSAID intake in patients with SpA.

Disease Severity in Ankylosing Spondylitis: Variation by Region and Local Area Deprivation

2010 ◽  
Vol 37 (3) ◽  
pp. 633-638 ◽  
Author(s):  
EMMA L. HEALEY ◽  
KIRSTIE L. HAYWOOD ◽  
KELVIN P. JORDAN ◽  
ANDREW M. GARRATT ◽  
JONATHAN C. PACKHAM
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Disease Severity ◽  
Psychological Health ◽  
Disease Duration ◽  
Rating Scale ◽  
Activity Index ◽  
Local Area ◽  
Area Deprivation ◽  
Deprived Areas

Objective.To investigate whether patient disease severity in ankylosing spondylitis (AS) varies among regions or by local area social deprivation.Methods.Eight hundred patients with AS from 8 specialist rheumatology centers across England were invited to participate in a cross-sectional survey. Sociodemographic and disease-related variables were collected [pain (numerical rating scale), disease activity (Bath AS Disease Activity Index), and physical function (Bath AS Functional Index)]. Deprivation was measured using the Index of Multiple Deprivation 2004.Results.Of the 800 patients invited, 468 responded (adjusted response rate 62.8%). Most were male (72.9%), with a mean age of 50.2 years (SD 12.1), and a mean diagnosed disease duration of 17 years (SD 11.4). Across all centers, those living in more deprived areas demonstrated significantly greater disease severity and poorer psychological health. After controlling for age, gender, disease duration, and region, greater deprivation was significantly associated with greater disease activity (OR 3.39; 95% CI 1.65, 6.98) and poorer function (OR 4.46; 95% CI 2.11, 9.44). There was a nonsignificant trend toward more pain (OR 1.98; 95% CI 0.97, 4.07). There was also a significant independent association between region and disease severity.Conclusion.The need for healthcare is greatest for patients with AS who are living in more socially deprived areas. With the growing use of interventional therapies, these findings have important implications if health service resources are to be allocated equitably; particularly as deprived patients are known to access healthcare less frequently.

scholarly journals Comparison of ankylosing spondylitis patients with and without fibromyalgia syndrome according to the disease activation scores and response to treatment

2021 ◽  
Vol 67 (4) ◽  
pp. 509-517
Author(s):  
Yunus Durmaz ◽  
İlker İlhanlı
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Disease Duration ◽  
Biological Therapy ◽  
Activity Index ◽  
Treatment Plan ◽  
Disease Onset ◽  
Response To Treatment ◽  
Hla B27 ◽  
Acute Phase Reactants

Objectives: The aim of this study was to investigate the association of fibromyalgia (FM) syndrome with ankylosing spondylitis (AS) and to compare the AS patients with and without FM according to the disease activity, clinical and laboratory findings, and response to treatment. Patients and methods: Between September 2016 and September 2020, a total of 511 patients (312 males, 119 females; mean age: 43.0±11.2 years; range, 18 to 77 years) who were diagnosed with AS were retrospectively analyzed. Age, sex, disease duration, disease onset age, and extra-articular findings were recorded. Medical treatments used by the patients for the treatment of AS and FM were noted. The erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), human leukocyte antigen-B27 (HLA-B27) status, and Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Ankylosing Spondylitis Disease Activity Score (ASDAS) with ESR (ASDAS-ESR) and ASDAS-CRP values were recorded. Results: The frequency of FM in AS patients was 23.2%. Totally, 75.4% of the FM patients were female. The HLA-B27 positivity, extra-articular involvement frequency, disease duration, and acute phase reactants levels were similar between AS patients with and without FM (p=0.118, p=0.154, p=0.829, p=0.113, and p=0.763, respectively). The AS patients with FM had lower rates of achieving remission or low disease activity, compared to those without FM. The mean of all three disease activity scores between these two groups was also higher in the AS patients with FM (p<0.001). The rate of use of biological therapy was significantly higher in the AS patients with FM than those without FM (p=0.037). Conclusion: Since the treatment plan of AS is made based on the disease activity scores, unnecessary biological therapy may be initiated for patients or the biological therapies they use may be switched unnecessarily. Therefore, it should be kept in mind that FM may present with AS in patients who do not respond to treatment clinically, and this may be misinterpreted as treatment unresponsiveness.

Assessment of Preclinical Atherosclerosis in Patients with Ankylosing Spondylitis

2012 ◽  
Vol 39 (2) ◽  
pp. 322-326 ◽  
Author(s):  
WAFA HAMDI ◽  
MOUNA CHELLI BOUAZIZ ◽  
IMEN ZOUCH ◽  
MOHAMED MEHDI GHANNOUCHI ◽  
MANEL HAOUEL ◽  
...  
Keyword(s):  
Risk Factors ◽  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Structural Damage ◽  
Activity Index ◽  
Age At Onset ◽  
Disease Activity Index ◽  
Mobility Limitations ◽  
Increased Risk ◽  
Preclinical Atherosclerosis

Objective.Epidemiological studies recently confirmed the increased risk of vascular morbidity and mortality during ankylosing spondylitis (AS). Increase of intima-media thickness (IMT) of the common carotid artery is a useful and noninvasive marker of preclinical atherosclerosis. The aim of our study was to compare IMT in patients with AS with matched controls and to determine risk factors of atherosclerosis related to AS.Methods.We performed a prospective study of 60 consecutive patients meeting modified New York criteria for AS, compared to 60 controls matched for age and sex. Disease-specific measures were determined. Measurement of IMT was performed by the same radiologist using the same machine and probe in right and left common carotid arteries, and the average of the 2 measurements was considered.Results.In total 48 male and 12 female patients were recruited, and 60 corresponding controls; mean age was 36 ± 11 years. We found significantly increased IMT in the AS group (0.51 ± 0.12 mm) compared with controls (0.39 ± 0.09 mm; p = 0.001). After adjustment for confounding factors, increased IMT was still present (p = 0.003). Age at onset of AS (p = 0.001), Bath AS Disease Activity Index (p = 0.002), AS Disease Activity Score (ASDAS) erythrocyte sedimentation rate (ESR; p = 0.047), ASDAS C-reactive protein (CRP; p = 0.012), Bath AS Functional Index (p = 0.008), global spine visual analog scale for pain (p = 0.000), Schober index (p = 0.039), Bath AS Metrology Index (p = 0.028), modified Stoke Ankylosing Spondylitis Spine Score (p = 0.035), and high ESR (p = 0.001) and CRP (p = 0.000) were correlated with high IMT in patients with AS. Otherwise, status of arthritis (p = 0.442), enthesitis (p = 0.482), and HLA-B27 (p = 0.528) seemed to have no effect on IMT.Conclusion.AS is associated with an increased risk of atherosclerosis independent of traditional risk factors. Disease activity, functional and mobility limitations, structural damage, and inflammation are the most incriminated risk factors.

scholarly journals Assessment of Subclinical Vascular Disease Associated with Ankylosing Spondylitis

2011 ◽  
Vol 38 (4) ◽  
pp. 723-729 ◽  
Author(s):  
NÓRA BODNÁR ◽  
GYÖRGY KEREKES ◽  
ILDIKÓ SERES ◽  
GYÖRGY PARAGH ◽  
JÁNOS KAPPELMAYER ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Vascular Disease ◽  
Aortic Stiffness ◽  
Disease Duration ◽  
Activity Index ◽  
Disease Activity Index ◽  
Intima Media Thickness ◽  
Diagnostic Tools ◽  
Spine Mobility

Objective.Studies indicate that ankylosing spondylitis (AS), as well as rheumatoid arthritis, may be associated with accelerated atherosclerosis and vascular disease. We assessed endothelial dysfunction, carotid atherosclerosis, and aortic stiffness in AS in context with clinical and laboratory measurements.Methods.Forty-three patients with AS and 40 matched healthy controls were studied. We assessed common carotid intima-media thickness (ccIMT), flow-mediated vasodilation (FMD), and pulse-wave velocity (PWV) in association with age, disease duration, smoking habits, body mass index, patient’s assessment of pain and disease activity, Bath AS Disease Activity Index, Bath AS Functional Index (BASFI), metric measurements, erythrocyte sedimentation rate, C-reactive protein, and HLA-B27 status.Results.We found impaired FMD (6.85 ± 2.98% vs 8.30 ± 3.96%; p = 0.005), increased ccIMT (0.65 ± 0.15 vs 0.54 ± 0.15 mm; p = 0.01), and higher PWV (8.64 ± 2.44 vs 8.00 ± 1.46 m/s; p = 0.03) in patients with AS compared to controls, respectively. We also found that ccIMT negatively correlated with FMD (r = −0.563; p = 0.0001) and positively correlated with PWV (r = 0.374; p = 0.018). Both ccIMT and PWV correlated with disease duration (r = 0.559; p = 0.013 and r = 0.520; p = 0.022, respectively), BASFI (r = 0.691; p = 0.003 and r = 0.654; p = 0.006), decreased lumbar spine mobility (r = −0.656; p = 0.006 and r = −0.604; p = 0.013), chest expansion (r = −0.502; p = 0.047 and r = −0.613; p = 0.012), and increased wall-occiput distance (r = 0.509; p = 0.044 and r = 0.614; p = 0.011).Conclusion.In this well characterized AS population, impaired FMD and increased ccIMT and PWV indicate abnormal endothelial function and increased atherosclerosis and aortic stiffness, respectively. The value of noninvasive diagnostic tools needs to be further characterized.

Predictors of Clinical Remission under Anti-tumor Necrosis Factor Treatment in Patients with Ankylosing Spondylitis: Pooled Analysis from Large Randomized Clinical Trials

2015 ◽  
Vol 42 (8) ◽  
pp. 1418-1426 ◽  
Author(s):  
Xenofon Baraliakos ◽  
Andrew S. Koenig ◽  
Heather Jones ◽  
Annette Szumski ◽  
David Collier ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Ankylosing Spondylitis ◽  
Tumor Necrosis Factor ◽  
Disease Activity ◽  
Clinical Remission ◽  
Partial Remission ◽  
Tumor Necrosis ◽  
Disease Duration ◽  
Hla B27 ◽  
Necrosis Factor

Objective.Investigate the role and relation of disease duration of different factors for achieving clinical remission with anti-tumor necrosis factor (TNF) treatment in patients with active ankylosing spondylitis (AS).Methods.Data pooled from 4 large (n = 1281) clinical trials were used to compare disease duration subgroups for placebo or sulfasalazine (SSZ) versus etanercept (ETN), which, in turn, were analyzed by age of diagnosis ≤ 40 versus > 40 years, HLA-B27 status, and baseline C-reactive protein (CRP) ≤ upper limit of normal (ULN) versus > ULN using chi-square tests, and ANCOVA. The primary efficacy measure was Assessments of SpondyloArthritis international Society (ASAS) partial remission (PR) after 12 weeks of treatment. Also analyzed were Bath AS Disease Activity Index and Functional Index, AS Disease Activity Scores, and ASAS response rates.Results.Overall, a larger percentage of patients achieved ASAS-PR with ETN versus SSZ or placebo. More patients with ≤ 2-year disease duration treated with ETN experienced partial remission (34%) versus longer disease duration (30%, 27%, and 22% for > 2–5, > 5–10, and > 10 yrs, respectively; all p < 0.05). In the subgroup of patients with both disease duration ≤ 2 years and aged ≤ 40 years at diagnosis, the treatment response was even more pronounced. Similar results were seen in HLA-B27–positive patients in the disease duration ≤ 2-year subgroup. Overall, patients with high CRP at baseline had better treatment responses compared with patients with normal CRP.Conclusion.Treatment response under anti-TNF treatment with ETN at 12 weeks was greatest among patients with disease duration ≤ 2 years and even more pronounced in subgroups of patients ≤ 40 years old or HLA-B27–positive at diagnosis.

scholarly journals Effects of ustekinumab on spondylitis-associated endpoints in TNFi-naïve active psoriatic arthritis patients with physician-reported spondylitis: pooled results from two phase 3, randomised, controlled trials

RMD Open ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. e001149 ◽  
Author(s):  
Philip S Helliwell ◽  
Dafna D Gladman ◽  
Soumya D Chakravarty ◽  
Shelly Kafka ◽  
Chetan S Karyekar ◽  
...  
Keyword(s):  
Psoriatic Arthritis ◽  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Activity Index ◽  
Hip Pain ◽  
Assessment Tools ◽  
Interleukin 12 ◽  
Hla B27 ◽  
Clinical Trial Registration ◽  
Link Type

BackgroundThe interleukin-12/23p40-subunit-inhibitor ustekinumab significantly improved spondylitis-related symptoms through Week 24 in psoriatic arthritis (PsA) patients with peripheral arthritis and physician-reported spondylitis (PA-PRS) in PSUMMIT-1&2. We further evaluated ustekinumab’s effect on spondylitis-related endpoints in PSUMMIT-1&2 tumour necrosis factor-inhibitor (TNFi)-naïve patients with PA-PRS.MethodsPatients with active PsA (≥5 swollen and ≥5 tender joints, C-reactive-protein ≥ 3.0 mg/L) despite conventional (PSUMMIT-1&2) and/or prior TNFi (PSUMMIT-2) therapy received subcutaneous ustekinumab 45 mg, 90 mg or placebo (Week 0, Week 4, Week 16). Changes in Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) neck/back/hip pain question (#2) and modified BASDAI (mBASDAI, excluding PA) scores and Ankylosing Spondylitis Disease Activity Score (ASDAS) responses were assessed at Weeks 12 and 24.ResultsThe pooled PSUMMIT-1&2, TNFi-naïve (n=747), PA-PRS (n=223) subset (158 with human-leucocyte-antigen (HLA)-B27 results) presented with moderate-to-severe spondylitis-related symptoms (mean BASDAI-neck/back/hip pain-6.51, mBASDAI-6.54, BASDAI-6.51, ASDAS-3.81). Mean Week 24 changes were larger among ustekinumab than placebo-treated patients for both neck/back/hip pain (−1.99 vs −0.18) and mBASDAI (−2.09 vs −0.59). Improvements in neck/back/hip pain and fatigue appeared numerically greater in HLA-B27+ than HLA-B27– patients; those for other domains were generally consistent. Greater proportions of ustekinumab versus placebo-treated patients achieved ASDAS clinically important improvement at Week 24 (decrease ≥ 1.1; 49.6% vs 12.7%; nominal p<0.05).ConclusionsImprovements in BASDAI neck/back/hip pain and mBASDAI among ustekinumab-treated, TNFi-naïve, PsA patients with PA-PRS were clinically meaningful and consistent across assessment tools. Numerically greater improvements in neck/back/hip pain in HLA-B27+ than HLA-B27– patients, noted in the context of similar overall mBASDAI improvements between the subgroups, suggest ustekinumab may improve disease activity in TNFi-naïve PsA patients likely to exhibit axial disease.Clinical trial registration numbersPSUMMIT 1, NCT01009086; PSUMMIT 2, NCT01077362.

Association of IL-12B Genetic Polymorphism with the Susceptibility and Disease Severity of Ankylosing Spondylitis

2011 ◽  
Vol 39 (1) ◽  
pp. 135-140 ◽  
Author(s):  
RUEY-HONG WONG ◽  
JAMES CHENG-CHUNG WEI ◽  
CHUN-HUANG HUANG ◽  
HONG-SHEN LEE ◽  
SHANG-YAN CHIOU ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Disease Severity ◽  
Activity Index ◽  
Disease Activity Index ◽  
T Helper 17 ◽  
Tyrosine Kinase 2 ◽  
Polymerase Chain ◽  
Activity Index Score ◽  
Interleukin 23

Objective.Interleukin 23 (IL-23) stimulates the differentiation of T helper 17 (Th17) cells, which are involved in the pathogenesis of ankylosing spondylitis (AS). Binding of IL-23 to the IL-23 receptor complex activates Janus kinases 2 and tyrosine kinase 2, which phosphorylate IL-23R and subsequently promote the transcription of the IL-17 gene. IL-12B encodes a p40 subunit common to IL-12 and IL-23. We evaluated the effects of IL-12B and IL-23R genotype on the occurrence and clinical features of AS.Methods.A total of 362 patients with AS and 362 healthy controls were enrolled in the study. Genotypes of IL-12B A1188C (rs3212227) and IL-23R C2370A (rs10889677) were identified by polymerase chain reaction/restriction fragment-length polymorphism. Disease activity and functional status were assessed by Bath AS indices.Results.Subjects carrying IL-12B CC [matched relative risk (RRm) 1.93, 95% CI 1.23–3.03] and IL-12B AC (RRm 1.73, 95% CI 1.21–2.46) genotypes had a significantly greater risk of developing AS than subjects with the IL-12B AA genotype. Subjects carrying both IL-12B CC and IL-23R AA genotypes also had a significantly higher risk (RRm 2.98, 95% CI 1.51–5.89) of developing AS compared to those with IL-12B AA and IL-23R CC/CA genotypes, and this interaction between IL-12B and IL-23R was significant. Patients with AS who had IL-12B CC and IL-12B AC genotypes had an obviously increased Bath Ankylosing Spondylitis Disease Activity Index score compared to those who carried the IL-12B AA genotype (4.3 vs 3.7).Conclusion.The IL-12B A1188C genotype was associated with the development and disease severity of AS.

Discriminant Capacity of Clinical Efficacy and Nonsteroidal Antiinflammatory Drug-sparing Endpoints, Alone or in Combination, in Axial Spondyloarthritis

2015 ◽  
Vol 42 (12) ◽  
pp. 2361-2368 ◽  
Author(s):  
Maxime Dougados ◽  
Emily Wood ◽  
Laure Gossec ◽  
Arnaud Dubanchet ◽  
Isabelle Logeart ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Axial Spondyloarthritis ◽  
Activity Index ◽  
Statistical Significance ◽  
Antiinflammatory Drug ◽  
Nonsteroidal Antiinflammatory Drug ◽  
Controlled Study ◽  
Biologic Treatment ◽  
Link Type

Objective.Using data from a randomized, double-blind, placebo-controlled study, we assessed the capacity of clinical and nonsteroidal antiinflammatory drug (NSAID)-sparing endpoints, alone and in combination, to discriminate between treatment effects in axial spondyloarthritis (axSpA).Methods.Patients with active NSAID-resistant axSpA received etanercept (ETN) 50 mg/week or placebo for 8 weeks and tapered/discontinued NSAID. In posthoc logistic regression analyses, OR were calculated that indicated the capacity of the following endpoints to discriminate between the effects of ETN and placebo at Week 8: Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) 50; BASDAI ≤ 3; Assessment of Spondyloarthritis international Society (ASAS) 20; ASAS40; Ankylosing Spondylitis Disease Activity Score (ASDAS) with C-reactive protein (CRP) < 1.3 and ASDAS-CRP < 2.1; ≥ 50% decrease from baseline in ASAS-NSAID score, score < 10, and score = 0; and each clinical and/or each NSAID measure.Results.In 90 randomized patients (ETN, n = 42; placebo, n = 48), disease activity was similar between groups at baseline: mean (± SD) BASDAI (ETN vs placebo) 6.0 ± 1.6 versus 5.9 ± 1.5. NSAID intake was high: ASAS-NSAID score 98.2 ± 39.0 versus 93.0 ± 23.4. OR ranged from 1.6 (95% CI 0.5–5.4) for ASDAS-CRP < 1.3 to 5.8 (95% CI 1.2–29.1) for BASDAI50 and NSAID score of 0; most measures (34/45) reached statistical significance (α = 0.05) favoring ETN. Most combined outcome variables using OR were more discriminant than single outcome measures.Conclusion.These findings suggest that changes in NSAID intake during treatment do not prevent demonstration of clinically relevant effects of biologic treatment, and combined (i.e., clinical with NSAID-sparing) endpoints were frequently more discriminant than single (i.e., clinical) endpoints. ClinicalTrials.gov (NCT01298531).

scholarly journals HLA-B27 is associated with reduced disease activity in axial spondyloarthritis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
James T. Rosenbaum ◽  
Michael H. Weisman ◽  
Hedley Hamilton ◽  
Cassie Shafer ◽  
Elin Aslanyan ◽  
...  
Keyword(s):  
Back Pain ◽  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Axial Spondyloarthritis ◽  
Activity Index ◽  
Disease Activity Index ◽  
Medical Decision ◽  
Hla B27 ◽  
Chi Square ◽  
The Difference

AbstractHLA-B27 is associated with increased susceptibility and disease activity of ankylosing spondylitis, but the effect of HLA-B27 on the activity of the broader category now called axial spondyloarthritis (AxSpA) is apparently the opposite. A modified Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) was used to assess disease activity among 3435 patients with spondyloarthritis (SpA) who participated in a survey designed to assess the effect of their disease and its treatment on the susceptibility and severity of Covid-19. Chi square testing was used to compare BASDAI scores between HLA-B27 positive and negative subjects. 2836 survey respondents were HLA B27 positive. The average BASDAI for the HLA-B27 negative cohort was 4.92 compared to 4.34 for the HLA-B27 positive subjects. Based on linear regression, a subject’s sex could not fully account for the differing BASDAI score in HLA-B27 negative subjects compared to those who are HLA-B27 positive. The difference between B27 positive and negative subjects was skewed by those with a BASDAI score of one or two. HLA-B27 positive subjects were more than twice as likely to have a BASDAI score of 1 compared to HLA B27 negative subjects and about 60% more likely to have a BASDAI score of 2 (p < 0.0001). HLA-B27 positive subjects have less active spondyloarthritis compared to HLA-B27 negative subjects as measured by a BASDAI score. Our data indicate that patients with mild back pain and a diagnosis of AxSpA are disproportionately HLA-B27 positive. The HLA-B27 test facilitates the diagnosis of axial spondyloarthritis such that patients from a community survey with mild back pain may be disproportionately diagnosed as having AxSpA if they are HLA-B27 positive. The test result likely introduces a cognitive bias into medical decision making and could explain our observations.

scholarly journals Male smokers with HLA-B27 positivity, SI joints inflammation have more radiological damages and higher prevalence of AS while females have higher BASDAI scores: observations from cluster analyses of a group of SpA patients

2016 ◽  
Vol 16 (2) ◽  
pp. 42-47
Author(s):  
Shirley Chiu Wai Chan ◽  
Helen Hoi Lun Tsang ◽  
Chak Sing Lau ◽  
Ho Yin Chung
Keyword(s):  
Ankylosing Spondylitis ◽  
Disease Activity ◽  
Activity Index ◽  
Disease Activity Index ◽  
Blood Parameters ◽  
Spinal Mobility ◽  
Lumbosacral Spine ◽  
Hla B27 ◽  
Cluster Analyses ◽  
Magnetic Resonance Imaging Mri

AbstractObjectivesTo describe the clinical characteristics and the relations with disease activity, functional status, and syndesmophytes formation in patients with axial spondyloarthritis (AxSpA) by categorizing them into different groups.MethodsOne hundred and sixty three patients with AxSpA were recruited. Clinical and blood parameters were collected. Patients were asked to complete the self-assessment questionnaires, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), and Bath Ankylosing Spondylitis Functional Index (BASFI). Spinal mobility was measured according to Bath Ankylosing Spondylitis Metrology Index (BASMI). Radiographs of cervical and lumbosacral spine were performed for modified Stoke Ankylosing Spondylitis Spine Score (mSASSS). Radiological sacroiliitis was scored for ankylosing spondylitis (AS). Magnetic resonance imaging (MRI) of the sacroiliac (SI) joints was performed for spondyloarthritis research consortium of Canada (SPARCC) MRI inflammation score. Two-way cluster analyses were performed to determine the relationships between the parameters.ResultsTwo cluster models were built using SPARCC scores of different scorers. Results were similar. The group of patients with highest mSASSS (20.33 vs 20.33) and prevalence radiological AS (85% vs 86%) were male patients (75% vs 75%), positive for HLA-B27 (70.0% vs 66.7%), smokers (87.5% vs 97.2%), and higher SPARCC SI joints score (5.32 vs 3.17). Higher BASDAI was observed among female sex. BASMI varies little but the group with highest BASMI (3.60 vs 3.62) also had highest mSASSS (20.33 vs 20.33).ConclusionOur data showed that male smokers with HLA-B27 positivity and SI joints inflammation have more radiological damage and higher prevalence of AS, consistent with known poor prognosis factors.

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