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Hospital Performance: Costs of acute admitted patients in public hospitals in 2011–12

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Knee replacement
Without complications or comorbidities

Knee replacements, also known as knee arthroplasty, are surgical procedures to replace a damaged knee, most commonly for arthritis. The data presented here relate to costs incurred by a hospital for patients who were admitted for a knee replacement without complications or comorbidities.

In 2011–12, there were 5,613 knee replacements without complications or comorbidities in major metropolitan and major regional public hospitals.

CACost per Admission

Across all major metropolitan hospitals, the average cost of a knee replacement was $18,800. The average cost of a knee replacement ranged from $10,600 at one hospital to $29,300 at another.

Across all major regional hospitals, the average cost of a knee replacement was $18,100. The average cost of a knee replacement ranged from $10,700 at one hospital to $22,600 at another hospital.

LOSLength of Stay

A previous Authority report showed the average length of stay knee replacement in 2011–12 was 5.5 days.7 At major metropolitan hospitals, the average length of stay ranged from 3.3 to 8.7 days, and at major regional hospitals the average length of stay ranged from 2.1 to 9.5 days.7

By comparing the cost of a patient’s knee replacement to their length of stay it is possible to assess the incremental cost that each additional day(s) spent in hospital contributes to the patient’s costs of care (Figure 13).

It is important to note that these costs do not reflect the total costs of this procedure. The report considers only the subset of total costs that are fully comparable between hospitals. For example, it excludes property, plant and equipment costs.

Figure 13: Table showing the average cost for a knee replacement without complications or comorbidities in major public hospitals, by length of stay, 2011–12

Length of stay Average cost
Same day $9,500
1 day $13,300
2 days $14,600
3 days $15,900
4 days $17,200
5 days $18,300
6 days $19,600
7 days $19,900

Sources: National Health Performance Authority analysis of results calculated using the National Hospital Cost Data Collection 2011–12 and Admitted Patient Care National Minimum Dataset 2011–12.

7. National Health Performance Authority. Hospital Performance: Length of stay in public hospitals in 2011–12 [Internet]. Sydney: National Health Performance Authority; 2013 Nov 7 [cited 2013 Nov 7]. Available from: Hospital Performance: Length of stay in public hospitals in 2011–12

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