Sex and neuter status | DYAR | Incidence (No. of cases) | Incidence per 1000 DYAR | Mean risk of IVDH per DYAR | RR compared with entire animals | RR compared with late-neutered animals |
---|---|---|---|---|---|---|
Entire bitches | 838 | 45 | 54 | 5% | 1 | / |
Bitches neutered < 12 months | 456 | 52 | 114 | 11% | 2.12 (1.44–3.11) | 1.37 (0.93–2.01) |
Bitches neutered > 12 monthsa | 554 | 46 | 83 | 8% | 1.55 (1.04–2.30) | 1 |
All neutered bitches | 1010 | 98 | 97 | 10% | 1.81 (1.28–2.54) | / |
Entire males | 936 | 55 | 58.7 | 6% | 1 | / |
Males neutered < 12 months | 574 | 52 | 90.6 | 9% | 1.54 (1.07–2.22) | 1.38 (0.96–1.99) |
Males neutered > 12 monthsa | 365 | 24 | 65.8 | 7% | 1.12 (0.7–1.78) | 1 |
All neutered males | 940 | 76 | 80.9 | 8% | 1.38 (0.98–1.93) | / |