Main demographic characteristics and disease history of patients with ankylosing spondylitis, with regard to country
| Country | n | Sex (male, %) | Age (years)* | Disease duration since first symptoms (years)* | Paid job (yes, %) | Current sick leave (yes, %) | Inflammatory bowel disease (yes, %) | Previous treatment with sulfasalazine (yes, %) | Previous treatment with methotrexate (yes, %) |
|---|---|---|---|---|---|---|---|---|---|
| *Values are mean (SD). | |||||||||
| Australia | 120 | 74 | 46 (13) | 19 (11) | 58 | 4 | 19 | 43 | 19 |
| Belgium | 97 | 75 | 44 (14) | 16 (12) | 57 | 22 | 7 | 29 | 11 |
| Canada | 94 | 79 | 38 (13) | 15 (11) | 61 | 23 | 10 | 11 | 5 |
| France | 137 | 55 | 41 (14) | 13 (11) | 59 | 17 | 10 | 38 | 5 |
| Germany | 200 | 73 | 45 (14) | 16 (11) | 67 | 12 | 6 | 32 | 15 |
| Italy | 103 | 80 | 47 (13) | 16 (9) | 62 | 29 | 17 | 35 | 15 |
| Mexico | 128 | 76 | 38 (13) | 12 (11) | 66 | 35 | 10 | 48 | 10 |
| The Netherlands | 98 | 75 | 47 (15) | 21 (13) | 64 | 20 | 7 | 29 | 1 |
| Spain | 183 | 78 | 47 (14) | 18 (12) | 64 | 42 | 5 | 37 | 9 |
| UK | 47 | 77 | 48 (12) | 20 (13) | 65 | 9 | 3 | 19 | 2 |
| Total | 1207 | 74 | 44 (14) | 16 (11) | 63 | 29 | 10 | 34 | 10 |