Table 1.

Criteria for the diagnosis or classification of gout.

American College of Rheumatology (American Rheumatism Association) Preliminary Criteria for the Classification of the Acute Arthritis of Primary Gout6
  Monosodium urate crystals in synovial fluid or tophus or presence of at least 6 of the following
  1. More than 1 attack of acute arthritis

  2. Maximal inflammation developed within 24 hours

  3. Monoarthritis attack

  4. Redness observed over joints

  5. First metatarsophalangeal joint painful or swollen

  6. Unilateral first metatarsophalangeal joint attack

  7. Unilateral tarsal joint attack

  8. Tophus (suspected)

  9. Hyperuricemia

  10. Asymmetric swelling within a joint on radiograph

  11. Subcortical cysts without erosions on radiograph

  12. Joint fluid culture negative for organisms during attacks

  Rome Criteria1
    Two of the following 4 criteria must be present to make a diagnosis of gout
  1. Serum uric acid level ≥ 7.0 mg/dl in men, or ≥ 6.0 mg/dl in women

  2. Tophi

  3. Urate crystals in synovial fluid or tissues

  4. History of attacks of painful joint swelling of abrupt onset with remission within 1–2 weeks

  New York Criteria1
    Urate crystals in synovial fluid or tissue or presence of at least 2 of the following
  1. History or observation of at least 2 attacks of painful limb swelling with remission within 1–2 weeks

  2. History or observation of podagra

  3. Presence of tophus

  4. History or observation of a good response to colchicine (major reduction in objective signs of inflammation within 24 hours of onset of therapy)