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Table 2 Clinical characteristics and drug exposures for RA patients

From: An administrative data validation study of the accuracy of algorithms for identifying rheumatoid arthritis: the influence of the reference standard on algorithm performance

Characteristics Aged 20 and older n = 69
Age (years), mean (SD) 61.9 (13.7)
Female gender 64%
Diagnosis provided by a Specialist 86%
Morning Stiffness 65%
Hand joint involvement (>1 swollen wrist, MCP, or PIP joint) 67%
Symmetric Arthritis (PIPs, MCPs, or MTPs) 65%
Rheumatoid Nodules 19%
Radiographic changes typical of RA 22%
2-10 medium-large joint involvement (shoulders, elbows, hips, knees, ankles) 39%
1-3 small joint involvement (MCPs, PIPs, 2nd-5th MTPs, thumb IPs, wrists) 54%
4-10 small joint involvement (as above) 51%
>10 joint involvement (as above) 26%
RF or ACPA positive 39%
Elevated ESR or CRP 45%
NSAID/COXIB use* 77%
Glucocorticosteroid use (Oral, inter-articular or intramuscular)* 61%
DMARD use* 80%
Biologic use* 17%
  1. *Prescribed by any physician (specialist or primary care physician).
  2. Abbreviations: MCPs metacarpophalangeal joints, PIPs proximal interphalangeal joints, MTPs metatarsophalangeal joints, IPs interphalangeal joints, DMARD disease-modifying anti-rheumatic drug, NSAID non-steroidal anti-inflammatory drug, COXIB COX-2 selective inhibitor, RF Rheumatoid Factor, ACPA anti–citrullinated protein antibody, ESR erythrocyte sedimentation rate, CRP C-reactive protein.