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Analysis of first detection method in different years (n, %)
| Years | Routine screening | Nonscreening | All patients |
|---|---|---|---|
| 1993–1996 | 29 (17.0) | 142 (83.0) | 171 (100) |
| 1997–2000 | 43 (17.3) | 206 (82.7) | 249 (100) |
| 2001–2004 | 68 (12.2) | 489 (87.8) | 557 (100) |
| 2004–2008 | 241 (19.3) | 1006 (80.7) | 1247 (100) |
| Total | 381 (17.1) | 1843 (82.9) | 2224 (100) |
