Wu et al., Song et al., Shao et al., Zhang et al., and Zhang et al. [37, 42, 43, 49, 57]
Classification criteria for gout [25] () More than one attack of acute arthritis () Maximum inflammation developed within 1 day () Oligoarthritis attack () Redness observed over joints () First MTP joint painful or swollen () Unilateral first MTP joint attack () Unilateral tarsal joint attack () Tophus (suspected or proven) () Hyperuricemia (more than 2 S.D. greater than the normal population average) () Asymmetric swelling within a joint on X-ray () Complete termination of an attack Case definition: ≥6 of 11 clinical criteria
ARA preliminary classification criteria for acute gout 1977 [24] () More than one attack of acute arthritis () Maximum inflammation developed within 1 day () Oligoarthritis attack () Redness observed over joints () First MTP joint painful or swollen () Unilateral first MTP joint attack () Unilateral tarsal joint attack () Tophus (suspected or proven) () Hyperuricemia (more than 2 S.D. greater than the normal population average) () Asymmetric swelling within a joint on X-ray () Subcortical cysts without erosions on X-ray () Complete termination of an attack Case definition: ≥6 of 12 clinical criteria required or presence of MSU crystals in SF or in tophus.
