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Mean age (y) of death per breed.
| Breed | No. dogs | Mean age of death (y) | Percentage (%) of group | ||
|---|---|---|---|---|---|
| Young | Adult | Mature | |||
| Boerboel | 4 | 7.72 | 25 | 50 | 25 |
| Bull Mastiff | 232 | 8.01 | 5 | 25 | 70 |
| Cane Corso | 11 | 7.89 | 9 | 18 | 72 |
| Dogue de Bordeaux | 26 | 7.95 | 8 | 57 | 35 |
| Great Dane | 28 | 8.00 | 4 | 46 | 50 |
| Mastiff | 659 | 8.00 | 10 | 34 | 56 |
| Mixed breed Mastiff | 25 | 8.10 | 12 | 50 | 38 |
| Neapolitan Mastiff | 31 | 8.17 | 14 | 40 | 46 |
| Other Mastiff | 37 | 8.16 | 5 | 41 | 54 |
