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Table 1 Baseline features of the patients in the KOBIO cohort at the start of TNFi treatment

From: Effects of tapering tumor necrosis factor inhibitor on the achievement of inactive disease in patients with axial spondyloarthritis: a nationwide cohort study

Clinical feature

N = 776

Age, years, mean (SD)

37.8 (12.5)

Male gender, n (%)

605 (78.0)

Disease duration, years, mean (SD)

8.1 (6.0)

BMI, mean (SD)

23.4 (3.5)

Obesity, n (%)

228 (29.4)

Ever-smoker, n (%)

385 (49.6)

HLA-B27 positive, n (%)*

696 (90.7)

Ankylosing spondylitis, n (%)

681 (87.8)

TNFi naïve, n (%)

608 (78.4)

TNFi agent

 Infliximab

201 (25.9)

 Etanercept

104 (13.4)

 Adalimumab

282 (36.3)

 Golimumab

189 (24.4)

ESR, mm/h, mean (SD)

38.3 (30.5)

CRP, mg/dL, mean (SD)

2.3 (2.8)

PGA (0–10), mean (SD)

6.2 (2.2)

BASDAI (0–10), mean (SD)

6.0 (1.9)

ASDAS-CRP, mean (SD)

3.6 (1.1)

BASFI, mean (SD)

3.5 (2.6)

  1. AS ankylosing spondylitis, ASDAS Ankylosing Spondylitis Disease Activity Score, BASDAI Bath Ankylosing Spondylitis Disease Activity Index, BASFI Bath Ankylosing Spondylitis Functional Index, BMI body mass index, CRP C-reactive protein, ESR erythrocyte sedimentation rate, HLA human leukocyte antigen, PGA patient global assessment, SD standard deviation
  2. *There were 9 missing data
  3. There were 16 missing data
  4. There were 19 missing data