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Table 2 Baseline characteristics of bio-naïve AS patients starting a first TNFi in 2006–2015

From: Biological treatment of ankylosing spondylitis: a nationwide study of treatment trajectories on a patient level in clinical practice

Baseline characteristics

2006–2015 cohort

2006–2010 subset-cohort

Total number

2590

1167

Sex, men (%)

1827 (71)

838 (72)

Age, mean (sd)

44 (13.2)

44 (12.8)

Disease duration

16 (12.3)

16 (11.8)

csDMARD (concomitant use), n (%)

634 (24)

384 (33)

NSAID (concomitant use), n (%)

2136 (82)

972 (83)

Peripheral diseasea

464 (18)

195 (17)

Type of TNFi

 Infliximab, n (%)

910 (35)

478 (41)

 Adalimumab, n (%)

782 (30)

405 (35)

 Golimumab, n (%)

329 (13)

9 (1)

 Etanercept, n (%)

483 (19)

273 (23)

 Certolizumab pegol, n (%)

86 (3)

2 (0)

Extra-articular SpA manifestations

 Anterior uveitis, n (%)

711 (27)

308 (26)

 Psoriasis, n (%)

156 (6)

65 (6)

 Inflammatory bowel disease, n (%)

179 (7)

95 (8)

  1. a≥ 1 swollen joint recorded at a visit in the year prior to TNFi start
  2. csDMARDs conventional synthetic disease-modifying anti-rheumatic drugs, NSAID non-steroidal anti-inflammatory drugs, TNFi tumour necrosis factor alpha inhibitors, SpA spondyloarthritis