Table 1

 General characteristics of patients (n = 50) completing follow up

VariableValue
Values are n (%) or *mean (SD).
BASDAI, Bath ankylosing spondylitis disease activity index; BASFI, Bath ankylosing spondylitis functional index; CRP, C reactive protein; ESR, erythrocyte sedimentation rate; SpA, spondyloarthritis.
Male26 (52%)
HLA-B2730/47 (63.8%)
Family history of SpA8 (16%)
Age at onset (years)*20.4 (8.8)
Onset <16 years18 (36%)
Uveitis6 (12%)
Clinical data at onset
Inflammatory back pain24 (48%)
Peripheral arthritis35 (70%)
Axial and peripheral, combined9 (18%)
Clinical data at presentation
Age (years)*26.5 (8.8)
Disease duration (years)*5.4 (5.7)
Inflammatory back pain46 (92%)
    Duration (years)*5.4 (5.6)
Peripheral arthritis41 (82%)
    Duration (years)*5.4 (5.8)
Sacroiliac joint pain16 (32%)
Peripheral enthesitis34 (68%)
Dactylitis18 (36%)
Tarsitis14 (28%)
High ESR or CRP18/30 (60%)
Sacroiliac joint radiographic findings
    Bilateral grade 031 (62%)
    Unilateral grade 110 (20%)
    Unilateral grade 21 (2%)
    Bilateral grade 17 (14%)
    Combined, unilateral grades 1 and 21 (2%)
BASDAI*3.9 (2.5)
BASFI*2.9 (2.3)
Modified Schober’s test (cm)*4.5 (1.2)
    Reduced18 (36%)
Chest expansion (cm)*4.3 (0.9)
    Reduced6 (12%)
Occiput to wall distance (cm)*0