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| Characteristic | Median (IQR) or N (%) |
|---|---|
| Year of first procedure | |
| 1989–1994 | 14 (19) |
| 1995–1999 | 14 (19) |
| 2000–2004 | 31 (42) |
| 2005–2008 | 14 (19) |
| Months between procedures (IQR) | 3.0 (1.8, 6.1) |
| Type of procedures | |
| PN then PN | 32 (44) |
| PN then RN | 10 (14) |
| RN then PN | 28 (38) |
| RN then RN | 3 (4) |
| Operated on first | |
| Larger tumour | 45 (62) |
| Smaller tumour | 19 (26) |
| Equal-sized tumours | 4 (5) |
| Unknown | 5 (7) |
