| 3 Months | 1 Year | 3 Years | 5 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2003 - 2004) | (Tx 2003 - 2004) | (Tx 2001 - 2004) | (Tx 1999 - 2004) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 63 | 77.8% | 5.2% | 63 | 66.7% | 5.9% | 122 | 53.8% | 5.2% | 216 | 43.6% | 3.9% |
| Yearly Center Volume | 0-4 | 8 | 87.5% | 11.7% | 8 | 75.0% | 15.3% | 18 | 47.6% | 13.9% | 43 | 35.7% | 7.8% |
| 5-7 | 1 | 0.0% | 0.0% | 1 | 0.0% | 0.0% | 2 | 0.0% | 0.0% | 22 | 63.6% | 11.5% | |
| 8-13 | 8 | 87.5% | 11.7% | 8 | 50.0% | 17.7% | 25 | 60.8% | 10.4% | 18 | 50.9% | 14.9% | |
| 14-22 | 13 | 84.6% | 10.0% | 13 | 76.9% | 11.7% | 32 | 49.9% | 10.2% | 33 | 45.8% | 10.2% | |
| 23+ | 33 | 72.7% | 7.8% | 33 | 66.7% | 8.2% | 45 | 59.6% | 7.8% | 100 | 40.2% | 5.9% | |