Table 4 The degeneration scores of SN-affected levels
Degeneration scorea | SN | Total | |
|---|---|---|---|
Present | Not present | ||
0 | 54 (2.8%) | 650 (33.4%) | 704 (36.2%) |
1 | 52 (2.6%) | 600 (30.8%) | 652 (33.5%) |
2 | 20 (1%) | 295 (15.2%) | 315 (16.3%) |
3 | 18 (0.9%) | 255 (13.1%) | 273 (14%) |
Total | 144 (7.4%) | 1800 (92.6%) | 1944 (100%) |