Table 4.

Previous Hip and Knee Surgery and Estimated Costs According to Severity^{^a}

↵^a N/A=not applicable, IQR=interquartile range.
^b Australian Refined Diagnosis-Related Groups version 5.2 (except for tibial osteotomy and revision knee replacement, which were coded with the use of version 6.0).
^c Total average cost per AR-DRG extracted from the National Hospital Cost Data Collection Cost Report Round 13 (2008–2009). All costs are reported in Australian dollars (A$1.00=US$1.04).
^d Comparison of costs across groups, P=.71.