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. 2013 Aug 28;472(5):1645–1651. doi: 10.1007/s11999-013-3142-0

Table 4.

Ratio of transient synovitis (TS) to septic arthritis (SA) in the various studies

Study TS:SA ratio Probability of septic arthritis with 4 predictors present
Kocher et al., 1999 [6] 1:1 96.6%
Kocher et al., 2004 [5] 2:1 93%
Luhmann et al., 2004 [11] 2.5:1 59%
Caird et al., 2006 [3] 0.5:1 93%
Sultan and Hughes, 2010 [12] 18:1 39.4%
Singhal et al., 2011 [11] 10:1 87%

This is compared with the risk of septic arthritis when four predictors are present.