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Table 2 Comparison of disease activity after 1-year follow-up and change of disease activity according to clusters

From: A cluster analysis of patients with axial spondyloarthritis using tumour necrosis factor alpha inhibitors based on clinical characteristics

 

Axial group (n = 828)

Extra-axial group (n = 214)

p-value

SJC at follow-up

0.12 (1.26)

0.23 (1.07)

0.221

TJC at follow-up

0.24 (1.63)

0.72 (3.46)

0.104

BASDAI at follow-up

2.60 (2.11)

2.63 (2.18)

0.840

BASFI at follow-up

1.53 (1.91)

1.32 (1.71)

0.187

ASDAS-ESR at follow-up

1.76 (1.00)

1.78 (0.95)

0.840

ASDAS-CRP at follow-up

1.61 (1.04)

1.48 (0.97)

0.123

ESR at follow-up (mm/h)

12.04 (15.49)

12.29 (14.99)

0.840

CRP at follow-up (mg/dL)

0.46 (0.98)

0.42 (1.05)

0.704

Δ SJC

− 0.37 (1.78)

− 0.98 (1.98)

< 0.001

Δ TJC

− 0.46 (2.08)

− 1.60 (2.27)

< 0.001

Δ BASDAI

− 3.36 (2.50)

− 3.75 (2.64)

0.104

Δ BASFI

− 1.92 (2.37)

− 2.34 (2.63)

0.096

Δ ASDAS-ESR

− 1.90 (1.25)

− 2.27 (1.34)

0.001

Δ ASDAS-CRP

− 2.00 (1.28)

− 2.40 (1.43)

0.001

Δ ESR (mm/h)

− 23.65 (28.45)

− 34.17 (31.38)

< 0.001

Δ CRP (mg/dL)

− 1.62 (2.72)

− 2.41 (3.62)

0.014

ASAS 20

444 (60.6)

131 (66.5)

0.196

  1. SJC swollen joint count, TJC tender joint count, BASDAI Bath Ankylosing Spondylitis Disease Activity Index, BASFI Bath Ankylosing Spondylitis Functional Index, ESR erythrocyte sedimentation rate, CRP C-reactive protein, ASDAS-ESR Ankylosing Spondylitis Disease Activity Score based on ESR, ASDAS-CRP Ankylosing Spondylitis Disease Activity Score based on CRP, ASAS 20 Assessment of SpondyloArthritis International Society 20% improvement criteria