Table 1

Patient characteristics in the QUEST-RA study per country
Country
 Number of sites
 Number of patients
 Age in years (mean)
 Female (%)
 Years of education (mean)
 Disease duration in years (mean)
 RF-positive (%)
 Extra-articular diseasea (%)
 Cardiovascular events (all)b (%)
Denmark
 3
 301
 58
 76
 11
 12
 74
 34
 9.97
Finland
 3
 304
 59
 72
 10
 13
 75
 18
 11.18
France
 4
 389
 55
 78
 11
 13
 75
 21
 3.60
Germany
 3
 225
 59
 84
 10
 13
 61
 36
 17.78
Ireland
 3
 225
 57
 64
 11
 11
 81
 30
 6.67
Italy
 4
 336
 61
 78
 8
 10
 73
 13
 8.93
Netherlands
 3
 317
 59
 68
 11
 9
 69
 13
 9.46
Poland
 7
 642
 53
 86
 12
 11
 71
 33
 11.84
Spain
 3
 301
 60
 74
 10
 11
 71
 23
 9.97
Sweden
 3
 248
 59
 72
 10
 12
 82
 23
 8.47
UK
 3
 126
 60
 78
 12
 15
 84
 30
 10.32
Turkey
 3
 309
 52
 85
 7
 11
 69
 18
 6.80
Serbia
 1
 100
 59
 88
 8
 10
 71
 23
 9.00
USA
 3
 294
 57
 72
 14
 9
 70
 24
 11.56
Argentina
 2
 246
 51
 90
 9
 10
 90
 26
 3.66
Total
 48
 4,363
 57 ± 1
 78
 10 ± 4
 11 ± 9
 73.7
 24.3
 9.31

aIncludes nodules, pulmonal fibrosis, pericarditis, vasculitis, Felty syndrome, and scleritis. bMyocardial infarction, angina, coronary heart disease, coronary bypass surgery, or stroke. QUEST-RA, Questionnaires in Standard Monitoring of Patients with Rheumatoid Arthritis; RF, rheumatoid factor.

Naranjo et al. Arthritis Research & Therapy 2008 10:R30   doi:10.1186/ar2383