ASAS CLassification of Axial SpondyloarthritiS Inception Cohort in the Netherlands

Completed

• Conditions: ankylosing spondylitis; axial spondyloarthritis; 10023213

• Registration Number: NL-OMON48283
• Lead Sponsor: eids Universitair Medisch Centrum

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Last Update Posted: 22 July 2024

Recruitment & Eligibility

• Status: Completed
• Sex: Not specified
• Target Recruitment: 60

Inclusion Criteria

Consecutive patients with current undiagnosed low back and/or buttock pain with onset <=45 years and duration >=3 months referred to the rheumatology department for diagnosis in the Netherlands.

Exclusion Criteria

• Patients with no back and/or buttock pain during last week
• Patients with back and/or buttock pain that lasted less than 3 months
• Patients with an onset of back and/or buttock pain after 45 years of age
• Patients with pain localized to the groin instead of back pain
• Patients with a prior rheumatologist confirmed diagnosis of SpA

Study & Design

• Study Type: Observational invasive
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>Primary Endpoint<br /><br>ASAS classification criteria that attain specificity of >=90% and sensitivity of<br /><br>>=75%.<br /><br>If the primary endpoint is met, the protocol will stop and no further analyses<br /><br>that aim to modify the criteria will be made.</p><br>