Table 1

Characteristics of the outpatients in the database

No of cases Definite disease (%) Women (%) Mean age (years) Mean age at onset (years) Mean disease duration (years)
Rheumatoid arthritis, RF+8 10493.476.256.145.710.3
Rheumatoid arthritis, RF−4 88877.977.855.747.77.9
Ankylosing spondylitis1 48682.836.143.228.514.5
Other seronegative spondyloarthropathy1 52480.964.343.935.97.7
Psoriatic arthritis2 11986.555.248.239.58.6
Reactive arthritis67248.758.538.735.63.2
Other arthritides2 02973.659.843.536.36.8
Systemic lupus erythematosus1 21188.389.541.832.29.6
Scleroderma32380.286.452.744.87.8
Sjögren's syndrome45375.594.750.841.29.3
Other connective tissue diseases1 28768.084.146.839.96.9
Polymyalgia rheumatica99881.671.866.863.63.2
Other vasculitides55978.162.850.143.76.2
Total25 65383.071.051.542.78.7