Table 1 Basic demographics of the New Zealand control and ankylosing spondylitis datasets
From: Prevalence of HLA-B27 in the New Zealand population: effect of age and ethnicity
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) | – | – | – |