The number and percentage of stages 3, 4, and 5 ROP patients in different years
| Year | Stage 3 | Stage 4 | Stage 5 | Total | |
|---|---|---|---|---|---|
| 2001 | No | 1 | 1 | 7 | 9 |
| % | 11.1 | 11.1 | 77.8 | 100 | |
| 2002 | No | 4 | 3 | 8 | 15 |
| % | 26.7 | 20.0 | 53.3 | 100 | |
| 2003 | No | 5 | 3 | 12 | 20 |
| % | 25.0 | 15.0 | 60.0 | 100 | |
| 2004 | No | 21 | 11 | 20 | 52 |
| % | 40.3 | 21.2 | 38.5 | 100 | |
| 2005 | No | 9 | 1 | 8 | 18 |
| % | 50.0 | 5.6 | 44.4 | 100 |