Table 4.
Revision Density, Overall and by Age Group of Patients by Bariatric Surgery Status, 2005–2011
| Age | Bariatric Surgery Group | Total N |
Revised N |
Total Years of Observation |
Revision Density (revisions/100 observation years) |
|---|---|---|---|---|---|
| Total | None | 11032 | 313 | 31109 | 1.0 |
| >2 years prior to TJA | 69 | 2 | 59 | 3.4 | |
| W/in 2 years of TJA | 102 | 5 | 186 | 2.7 | |
| ≤39 | None | 28 | 1 | 65 | 1.5 |
| >2 years prior to TJA | 0 | 0 | 0 | 0.0 | |
| W/in 2 years of TJA | 1 | 0 | 0 | 0.0 | |
| 40–49 | None | 511 | 28 | 1414 | 2.0 |
| >2 years prior to TJA | 4 | 0 | 7 | 0.0 | |
| W/in 2 years of TJA | 17 | 2 | 37 | 5.4 | |
| 50–59 | None | 2903 | 87 | 8159 | 1.1 |
| >2 years prior to TJA | 33 | 2 | 23 | 8.6 | |
| W/in 2 years of TJA | 42 | 2 | 75 | 2.7 | |
| 60–69 | None | 4713 | 124 | 13368 | 0.9 |
| >2 years prior to TJA | 24 | 0 | 23 | 0.0 | |
| W/in 2 years of TJA | 40 | 1 | 72 | 1.4 | |
| 70–79 | None | 2525 | 66 | 7109 | 0.9 |
| >2 years prior to TJA | 7 | 0 | 5 | 0.0 | |
| W/in 2 years of TJA | 2 | 0 | 3 | 0.0 | |
| ≥80 | None | 352 | 7 | 994 | 0.7 |
| >2 years prior to TJA | 1 | 0 | 1 | 0.0 | |
| W/in 2 years of TJA | 0 | 0 | 0 | 0.0 |
TJA=Total joint arthroplasty.