Table 1.
Number of stays, costs, and percent readmitted for TKR patients, 2009 and 2014
| Characteristics | Number of stays | Mean costs per initial stay | 30-day % readmitted | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 2009 | 2014 | % change | 2009 | 2014 | % change | 2009 (%) | 2014 (%) | % change | |
| Overall | 29,780 | 29,757 | –0.1 | $9,929 | $11,904 | 20 | 5.0 | 4.2 | –16 |
| Age | |||||||||
| 18–44 | 834 | 745 | –11 | $10,967 | $12,656 | 15 | 5.5 | 5.0 | (–9) |
| 45–64 | 9,840 | 10,194 | 4.0 | $9,504 | $11,978 | 26 | 4.1 | 3.5 | (–15) |
| 65+ | 19,003 | 18,656 | –2 | $10,110 | $11,828 | 17 | 5.6 | 4.6 | (–18) |
| Sex | |||||||||
| Male | 12,432 | 13,100 | 5 | $10,040 | $12,167 | 21 | 5.6 | 4.8 | –14 |
| Female | 17,348 | 16,656 | –4 | $9,850 | $11,699 | 19 | 4.6 | 3.8 | –17 |
| Payor | |||||||||
| Medicare | 20,486 | 20,273 | 1 | $9,942 | $11,854 | 19 | 5.7 | 4.8 | –16 |
| Medicaid | 1,266 | 1,655 | 30 | $9,467 | $12,835 | 36 | 7.1 | 5.7 | –20 |
| Private Insurance | 7,014 | 6,661 | –5 | $9,546 | $11,709 | 23 | 3.5 | 2.9 | –17 |
| Income | |||||||||
| 1st quartile | 7,782 | 6,538 | –16 | $9,414 | $10,837 | 15 | 5.4 | 4.6 | –15 |
| 2nd quartile | 8,179 | 8,283 | 1 | $9,865 | $11,811 | 20 | 5.0 | 4.3 | –14 |
| 3rd quartile | 7,378 | 7,468 | 1 | $9,807 | $12,285 | 25 | 4.9 | 4.0 | –18 |
| 4th quartile | 5,947 | 7,041 | 18 | $10,795 | $12,475 | 16 | 4.6 | 4.0 | –13 |
| Residence | |||||||||
| Metropolitan | 23,428 | 24,043 | 3 | $10,075 | $11,844 | 18 | 5.1 | 4.2 | –18 |
| Non-metropolitan | 6,353 | 5,714 | –10 | $9,406 | $12,153 | 29 | 4.7 | 4.0 | –15 |
Notes: To calculate percentage change: First, determine the difference by subtracting 2009 data from 2014 data. Then, divide the difference by the 2009 data and multiply by 100. Negative numbers reflect reduced stays or costs.
Data not presented for patients ages 0 to 17 years.