Table 1

Baseline characteristics of patients with AS completing the study

The Netherlands (n=130)France (n=53)Belgium (n=26)
BASFI, Bath Ankylosing Spondylitis Functional Index; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index.
*Difference between The Netherlands and France: p<0.05; †difference between The Netherlands and Belgium: p<0.05; ‡difference between France and Belgium: p<0.05. χ2 was used to test differences in proportions and one way analysis of variance for parametric variables.
Male (%)706974
Age* (years), mean (SD)46 (12)38 (12)42 (14)
Formal education ≤12 years (%)*†834864
Manual profession (%)*442345
Disease duration (diagnosis), mean (SD)12 (9)9 (7)11 (10)
Inflammatory bowel disease (%)*1008
Peripheral arthritis (%)†‡28268
BASFI, mean (SD)*†3.9 (2.4)2.5 (2.9)2.6 (2.3)
BASDAI, mean (SD)*3.7 (2.1)2.8 (2.3)3.1 (1.9)
EuroQol 5 dimensions, mean (SD)0.69 (0.16)0.63 (0.29)0.67 (0.14)