Clinical and Radiological Manifestations of Coxitis in Patients With Ankylosing Spondylitis Treated With Golimumab

Study Overview
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Brief Summary
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Rationale. Coxitis in AS is inflammation of hip(s) affecting significant number of patients. It is associated with worse function and more expressed axial disease requiring hip replacement at end-stage. Number of studies dedicated to coxitis treated with TNF alpha inhibitors is very limited. Primary objective. To evaluate change of functional impairment in AS patients with coxitis from baseline to 12 months of therapy with golimumab by BASFI in daily clinical practice Study design. This study is a non-interventional prospective observational cohort study conducted in multiple centers across Russia. Study population. Patients with ankylosing spondylitis (according to the modified New York criteria) with coxitis newly prescribed golimumab during the course of usual clinical care will be enrolled and followed prospectively for 24 months with data collection at the approximate time points: baseline (pre-treatment) and consequent every 6 months. Patients will receive golimumab as prescribed in regular clinical practice. Statistical Methods. Quantitative variables will be tested for normal distribution using the Shapiro-Wilk test. The hypothesis of equality of variances will be tested using Levene's test. Quantitative variables matching a normal distribution will be described in terms of the mean ± standard deviation, and values outside of the normal distribution as medians, 25% and 75% quartiles. Qualitative variables will be presented in the form of percentages of the absolute value N. Sample Size and Power Calculations. Sample size calculation is based on data from GO-RAISE registration study in which golimumab was evaluated in patients with AS. The baseline BASFI was 5.0 which changed by mean (± SD, standard deviation) -2.5 (± 2.12) at week 52 (approximately 12 months). The analysis of the data shows that the minimum necessary sample size should be 18 patients to show a statistically significant change of BASFI from baseline to 12 months. On this basis and considering that the dropout rate over the two years is expected to be 30%, we decided that the necessary number of patients to be included into protocol should be 39 individuals. It is expected that around 27 patients will be included in the patient set completing the study. Power of the study is 90% with formula evaluation P = 1-β where P is power and β is type 2 error = 10%.

Official Title
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A Prospective Observational Study to Evaluate Clinical and Radiological Manifestations of Coxitis in Patients With Ankylosing Spondylitis Treated With Simponi® (Golimumab)

Conditions
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Coxitis, Ankylosing Spondylitis

Intervention / Treatment
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* Drug: Golimumab Injection


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult patients (>18 years of age) with definite AS (as per modified New York criteria) Coxitis with BASRI-hip score 0-2 Newly prescribed golimumab according to usual clinical practice Naïve to anti-TNFs or other biologic agents prior to initiation of golimumab as indicated by the patient's medical records Patient is enrolled after the investigator's decision to treat with golimumab, but before initiation of treatment with golimumab Patient was informed of the benefits and risks of golimumab as per normal practice using the product leaflet Signed informed consent form Exclusion Criteria: Any contraindication to golimumab in accordance to the label of Simponi® BASRI-hip score 3-4 Any contraindication to MRI, e.g. previous hip joint replacement, heart pace maker.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Golimumab injection<br>Patients with ankylosing spondylitis and coxitis being treated with Simponi (golimumab) according to local clinical practice and label. | Drug: Golimumab Injection<br>* Simponi (golimumab) in fixed dose of 50 mg sc per month according to local label and local clinical practice.<br>* Other names: Based on decision of investigators.;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change of BASFI (Bath Ankylosing Spodylitis Functionality Index) | The BASFI is a self-assessment instrument for defining and monitoring functional ability (physical functioning) in patients with AS. Contains 10 items: 8 items concerning activities referring to the functional anatomy of the patients (bending, reaching, changing position, standing, turning, and climbing steps) and 2 items assessing the patients' ability to cope with everyday life. | From baseline to 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change of BASFI (Bath Ankylosing Spodylitis Functionality Index) | The BASFI is a self-assessment instrument for defining and monitoring functional ability (physical functioning) in patients with AS. Contains 10 items: 8 items concerning activities referring to the functional anatomy of the patients (bending, reaching, changing position, standing, turning, and climbing steps) and 2 items assessing the patients' ability to cope with everyday life. | From baseline to 24 months | 
| Change of BASMI (Bath Ankylosing Spodylitis Mobility Index) | The BASMI is an instrument that is typically used to assess mobility of spine and hip joints. The BASMI consists of 5 items which are clinical measures of cervical rotation, tragus to wall distance, lumbar flexion, lumbar side flexion, and intermalleolar distance. Each item is scored from 0 to 10 based on individually defined cut points. | From baseline to 12 and 24 months | 
| Change of ASDAS-CRP (Ankylosing Spondylitis Disease Activity Score) | ASDAS is an instrument to measure disease activity in AS based on a composite score. The score includes patient-reported assessments of back pain, duration of morning stiffness, peripheral joint pain and/or swelling, general well-being, and a serologic marker of inflammation (erythrocyte sedimentation rate [ESR] or C-reactive protein [CRP]). | From baseline to 12 and 24 months | 
| BASRI-hip (Bath Ankylosing Spondylitis Radiology Index) | In BASRI-hip hips radiographs are graded on a scale of 0-4 (0 - no change; 1 - suspicious: focal joint space narrowing; 2 - mild: circumferential joint space narrowing >2mm; 3 - moderate: circumferential joint space narrowing ≤ 2mm or bone-on-bone apposition of <2 cm; and 4 - severe: bone deformity or bone-on-bone apposition of ≥2 cm) | From baseline to 12 and 24 months | 
| BASDAI (Bath AS Disease Activity Index) | BASDAI is an instrument to measure disease activity in AS based on a omposite score. The index includes patient-reported levels of back pain, fatigue, peripheral joint pain and swelling, localized tenderness, and the duration and severity of morning stiffness. | From baseline to 12 and 24 months |