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.