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. 2020 Aug 19;70(698):467. doi: 10.3399/bjgp20X712565

Box 2.

Probability of septic arthritis depending on the number of positive findings on assessment

Kocher criteria to determine risk for paediatric septic arthritis5
Non-weight bearing on affected side Probability dependent on number of findings:
1 = 3%
2 = 40%
3 = 93%
4 = 99%
Erythrocyte sedimentation rate >40 mm/hour
Temperature >38.5°C
White cell count >12 000 cells/ml