SSZ: sulfasalazine; MTX: methotrexate; NSAIDs: nonsteroidal anti-inflammatory drugs; SD: standard deviation; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; BDT: Bangladeshi Taka; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional Index; BASMI: Bath Ankylosing Spondylitis Metrology Index; MASES: Maastricht Ankylosing Spondylitis Enthesitis Score. Here, CRP is linked to ankylosing spondylitis.