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S-factors screening for early inflammatory arthritis (from Arthritis Care)a
| Factor | Sign, symptom |
|---|---|
| Stiffness | Early morning stiffness lasting > 30 minutes |
| Swelling | Persistent swelling of ≥ 1 joint, particularly hand joints |
| Metacarpophalangeal (MCP) squeeze test | Tenderness on squeezing across all 4 MCP joints |
| Metatarsophalangeal squeeze test | Tenderness on squeezing across the metatarsal heads |
Referral to a rheumatologist is recommended if ≥ 1 factor is present.
