Table 1

Demographic data for ankylosing spondylitis patients and healthy controls

Ankylosing spondylitis patients (n = 39)

Healthy controls (n = 42)


Age (years)

47 (20 to 85)

39 (27 to 70)

Male

82

52

HLA-B27

76

Not available

Disease duration (years)

22 (2 to 62)

Not applicable

Ethnicity

Caucasian

77

54

Asian

8

36

Hispanic

15

10


Data presented as mean (range) or percentage.

Matzkies et al. Arthritis Research & Therapy 2012 14:R261   doi:10.1186/ar4106

Open Data