Indicator codes – based on code
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Example codes
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(full list available in Additional file 1)
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Inflammatory arthritis diagnosis
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Seronegative arthritis, polyarthropathy, arthralgia of multiple joints
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Rheumatoid Factor test
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RhF , latex test, Rose Waller (included regardless of result)
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Synovitis
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Synovitis
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DMARD prescription
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List of drug names drawn up from British National Formulary
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Referral to Rheumatology
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Rheum. disorder monitoring, Rheum. treatment change, Rheum. management plan given, Under care of rheumatologist
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Joint signs and symptoms
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Joint abnormal, joint swelling, reduced joint movement, joint movement painful, joint stiffness, inflammation joint, etc.
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Keyword groups – based on text
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Example search terms
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Full list available in Additional file 2
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Rheumatoid Arthritis
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RA. RhA, rheum arth,
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Positive rheumatoid factor test
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Positive RhF , rheum fac +
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Inflammatory arthritis
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Polyarthitis, seronegative arthritis, inflammatory arthritis
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Synovitis |
Synovitis |