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Completed

NCT Number: NCT00900796

Study Evaluating Predictors of Response in Patients With Ankylosing Spondylitis

The objective of this observational study is to determine the incidence of response in patients with predictive factors of major clinical response in active ankylosing spondylitis (AS) in patients who start anti-tumor necrosis factor (anti-TNF) therapy and correlate these findings in patients who switch from one to another anti-TNF due to inefficacy under usual clinical practice conditions in Spain.

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Key information

Conditions

Ankylosing Spondylitis Ankylosis Arthritis Axial Spondyloarthritis Bone Diseases Joint Diseases Musculoskeletal Diseases Spinal Diseases Spondylarthritis Spondylarthropathies Spondylitis Spondylitis, Ankylosing

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Pfizer Investigational Site

Madrid, 28006, Spain

About this study

A sample size of 240 patients, 120 of them exposed and 120 not exposed to factors of response. Sample will be obtain from all the consecutive patients attending the rheumatology settings included in the study who fulfill the inclusion criteria

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients diagnosed of active AS who will start anti-TNF therapy following standard clinical practice as per summary of product characteristics doses.
  • >18 years, both genders, any disease duration
  • Signature of informed consent

Exclusion criteria

  • Previous treatment with biological therapies
  • Active tuberculosis infection (local guidelines for appropriate screening and treatment of tuberculosis in the setting of anti-TNF therapy must be followed)

Treatment and study plan

Treatment switching

Other

If the patients do not response to first AntiTNF treatment, Investigator can switch to another anti TNF.Spanish Guidelines will be provided to the investigators, which recommend stopping biologics if there is an inadequate response after 16w of therapy and switch to another biologic. Responsive patients to the first anti-TNF who continue with this first anti-TNF adjusting dose treatment according to the Spanish guidelines or investigator criteria. The doses for each Anti TNF will be done following specific SmPc and under Investiagtor criteria

Primary outcomes

  1. Percentage of Participants With a Clinical Response

    Time frame: Week 16

    Assessment of clinical response was as per investigator's discretion. Investigators were provided with the final consensus document of the Spanish Society for Rheumatology (SER) for the biological treatment of spondyloarthropathies as a guide for defining active AS, the indication of treatment with biological therapy and the assessment of response to it.

Secondary outcomes

  1. Percentage of Participants With High Probability of Response and no Response Who Received Second Anti-TNF Treatment

    Time frame: Week 32

    High probability of response=participants who met at least 3 of 5 criteria at start of treatment:C-reactive Protein (CRP) >15 mg/Liter (mg/L);time from onset of disease <10 years;total spinal pain >30 millimeter (mm), mean score on 100 mm visual numeric scale (VNS) for nocturnal, total spinal pain;Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) >4 centimeter (cm), mean score on 10 cm VNS for discomfort, pain, fatigue;Bath Ankylosing Spondylitis Functional index (BASFI) <4.5 cm, mean score on 10 cm VNS evaluating functional capacity. Assessment of response was per investigator.

  2. Percentage of Participants With Low Probability of Response and no Response Who Received Second Anti-TNF Treatment

    Time frame: Week 32

    Low probability of response = participants who met no more than 2 of 5 criteria at time of treatment start: CRP > 15 mg/L; time from onset of disease less than < 10 years; total spinal pain > 30 mm, measured as mean score on 100 mm VNS (higher score=more severe pain) for nocturnal and total spinal pain; BASDAI > 4 cm, measured as mean score on 10 cm VNS (higher score=more severe state) for discomfort, pain and fatigue; BASFI < 4.5 cm; measured as mean score on 10 cm VNS (higher score=less functionality) evaluating functional capacity. Assessment of response was as per investigator's criteria.

  3. Percentage of Participants With Low Probability of Response and a Clinical Response at Week 16

    Time frame: Week 16

    Low probability of response = participants who met no more than 2 of 5 criteria at time of treatment start: CRP > 15 mg/L; time from onset of disease less than < 10 years; total spinal pain > 30 mm, measured as mean score on 100 mm VNS (higher score=more severe pain) for nocturnal and total spinal pain; BASDAI > 4 cm, measured as mean score on 10 cm VNS (higher score=more severe state) for discomfort, pain and fatigue; BASFI < 4.5 cm; measured as mean score on 10 cm VNS (higher score=less functionality) evaluating functional capacity. Assessment of response was as per investigator's criteria.

  4. Percentage of Participants With Assessment in Ankylosing Spondylitis (ASAS) 40 Response at Week 16

    Time frame: Week 16

    ASAS measures symptomatic improvement in ankylosing spondylitis (AS) participants ASAS = 4 domains: participant global assessment of disease activity, pain, function, inflammation. ASAS 40 = 40 percent (%) improvement from baseline and an absolute change of greater than or equal to (>=) 2 units on a 0-10 scale (0=no disease activity, 10=high disease activity) for >= 3 domains, and no worsening in remaining domain.

  5. Percentage of Participants Who Switched to Another Anti-TNF Treatment Due to Lack of Efficacy

    Time frame: Week 16

  6. Percentage of Participants With ASAS 40 Response Who Started Second Anti-TNF Treatment and Were Treated for at Least 16 Weeks

    Time frame: Week 32

    ASAS measures symptomatic improvement in ankylosing spondylitis (AS) participants ASAS = 4 domains: participant global assessment of disease activity, pain, function, inflammation. ASAS 40 = 40% improvement from baseline and an absolute change of greater than or equal to (>=) 2 units on a 0-10 scale (0=no disease activity, 10=high disease activity) for >= 3 domains, and no worsening in remaining domain.

Sponsors and collaborators

Lead sponsor

Pfizer

Industry

Registry information

Official study title

Success and Failure of Biological Therapy: Predictors of Response in Patients With Active Ankylosing Spondylitis

Acronym: PRETEA

Important dates

Study start
2009
Primary completion
2011
Study completion
2011
First posted
May 13, 2009
Registry last updated
Jun 19, 2012

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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