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Distribution of N categories as defined by the 7th and 8th editions
| 8th edition | ||||||
|---|---|---|---|---|---|---|
| N0 | N1 | N2 | N3 | Total | ||
| 7th edition | N0 | 250 (19.0%) | 250 (19.0%) | |||
| N1 | 719 (54.6%) | 12 (0.9%) | 731 (55.4%) | |||
| N2 | 252 (19.1%) | 26 (2.0%) | 278 (21.1%) | |||
| N3a | 16 (1.2%) | 16 (1.2%) | ||||
| N3B | 42 (3.2%) | 42 (3.2%) | ||||
| Total | 250 (19.0%) | 719 (54.6%) | 252 (19.1%) | 96 (7.3%) | 1317 | |
