Table 1

Basic demographics of the New Zealand control and ankylosing spondylitis datasets
Demographic Caucasian controls, A1 Caucasian controls, A2 New Zealand Māori controls AS patients (New York criteria)
(n= 485) (n= 735) (n= 111) (n= 176)
Males (%) 200/485 (41.2) 570/735 (77.5) 30/111 (27.0) 113/152 (74.3)
Mean age (years) 44.9 69.6 41.7 46.7
Ethnicity 100% Caucasian 100% Caucasian 100% New Zealand Māori 92.1% Caucasian, 7.9% Māori
Mean (SD) BASDAI 4.8 (2.5)
Mean (SD) BASFI 4.4 (2.8)
Mean (SD) BASMI 3.2 (2.6)
Mean (SD) CRP 11.5 (13.7)
Patients receiving TNFi (%) 69 (39.2)
Comorbidities (%)
 Osteoarthritis 3 (0.6) 125 (29.0)
 Rheumatoid arthritis 1 (0.2) 28 (6.5) 9 (8.1)
 Other forms of arthritis 10 (2.3)
 IBD 1 (0.2)

BASDAI, Bath Ankylosing Spondylitis Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; BASMI, Bath Ankylosing Spondylitis Metrology Index; CRP, C-reactive protein; IBD, inflammatory bowel disease; SD, standard deviation; TNFi, tumour necrosis factor inhibitors.

Roberts et al.

Roberts et al. Arthritis Research & Therapy 2013 15:R158   doi:10.1186/ar4341

Open Data