Table 4.
Multivariable estimates, standard errors (SE's) and mortality rate ratios (MRR), with 99.9% confidence intervals (99.9% CI), developed using Poisson regression on diagnostic categories trauma, heart and neurological in dogs insured at Agria1 from 1995 to 2000.
| Diagnostic category 2 | ||||||
| Trauma | Heart | Neurological | ||||
| Variable | MRR (99N.9% CI)3 | Estimate (SE) | MRR (99.9% CI) | Estimate (SE) | MRR (99.9% CI) | Estimate (SE) |
| Intercept | - | 4.8732 (0.0464) | - | -7.4284 (0.0929) | - | -6.1979 (0.0805) |
| Gender (female) | 0.8(0.8–0.9) | -0.1961 (0.0277) | 0.5(0.5–0.6) | -0.6040 (0.0426) | 0.7(0.6–0.8) | -0.3586 (0.0469) |
| Age (in years) | 0.9(0.9–0.9) | -0.069 (0.0053) | 1.4(1.4–1.5) | 0.3552 (0.0111) | 1.1(1.1–1.1) | 0.0945 (0.0091) |
| Breed | ||||||
| CKC spaniel4a | 0.5(0.3–0.8) | -0.7135 (0.1314) | 3.0(1.7–5.5) | 1.1074 (0.1793) | 1.05 | - |
| German shepherd (GS) | 0.7(0.6–0.9) | -0.3225 (0.0637) | 2.1(1.0–4.4) | 0.7300 (0.2277) | 0.5(0.2–0.9) | -0.7643 (0.1977) |
| Drever | 4.4(3.8–5.1) | 1.4848 (0.0447) | 1.05 | - | 1.05 | - |
| Dachshund | 2.3(2.0–2.7) | 0.842 (0.0493) | 0.1(0.01–0.4) | -2.5337 (0.5188) | 0.3(0.2–0.6) | -1.1793 (0.1943) |
| Labrador retriever | 0.5(0.3–0.6) | -0.7764 (0.0941) | 0.5(0.3–0.8) | -0.7959 (0.1677) | 0.6(0.4–1.0) | -0.4432 (0.1276) |
| Springer spaniel4b | 0.5(0.3–0.8) | -0.7061 (0.1303) | 1.05 | - | 1.05 | - |
| Mongrel | 1.05 | - | 0.5(0.3–1.0) | -0.7037 (0.2027) | 1.05 | - |
| Golden retriever | 0.3(0.2–0.4) | -1.1771 (0.1046) | 0.5(0.3–0.8) | -0.7061 (0.1401) | 1.05 | - |
| Poodle (min/toy) | 1.05 | - | 0.4(0.2–0.9) | -0.9602 (0.2693) | 1.05 | - |
| Min dachshund4c | 1.7(1.4–2.1) | 0.5237 (0.0654) | 0.3(0.1–1.0) | -1.1053 (0.3352) | 0.3(0.1–0.7) | -1.1682 (0.2597) |
| Irish wolfhound | 1.05 | - | 29 (19–44) | 3.3645 (0.1294) | 1.05 | - |
| St Bernard | 1.05 | - | 12 (6.5–20) | 2.4438 (0.1746) | 5.1(2.4–11) | 1.6204 (0.2309) |
| Great Dane | 1.05 | - | 21 (13–32) | 3.0210 (0.1371) | 3.5(1.6–7.8) | 1.2455 (0.2442) |
| Bernese mtn dog4d | 1.05 | - | 1.05 | - | 1.05 | - |
| Newfoundland | 1.05 | - | 10 (7.3–14) | 2.3268 (0.1044) | 1.05 | - |
| Dobermann | 1.05 | - | 6.4(4.0–10) | 1.8546 (0.1439) | 1.05 | - |
| Leonberger | 1.05 | - | 8.6(5.6–13) | 2.1565 (0.1344) | 1.05 | - |
| Boxer | 0.4(0.2–0.8) | -0.9084 (0.2243) | 2.7(1.7–4.5) | 1.0094 (0.1527) | 1.1(0.4–3.3) | 0.0995 (0.3296) |
| Greyhound | 2.8(1.8–4.5) | 1.0461 (0.1411) | 3.3(1.3–8.2) | 1.1839 (0.2794) | 1.05 | - |
| Pyrenees | 1.05 | - | 1.05 | - | 1.05 | - |
| Interactions | ||||||
| Age-CKC spaniel | NA6 | NA | 1.3(1.2–1.4) | 0.2667 (0.0253) | NA | |
| Age-GS | NA | NA | 0.9(0.8–1.0) | -0.1500 (0.0409) | 1.2(1.1–1.3) | 0.1812 (0.0341) |
| Age-Dachshund | NA | NA | 1.5(1.2–1.9) | 0.4194 (0.0678) | NA | |
| Age-Boxer | NA | NA | NA | NA | 1.3(1.1–1.5) | 0.2237 (0.0523) |
1 – Agria Insurance, PO 70306, SE-107 23 Stockholm, Sweden
2 – Separate models were run for each heading
3 – MRR ratio from Poisson regression = EXP(estimate), interpreted as risk for that variable (eg. breed) relative to the baseline (all breeds not in the model), adjusted for gender and age
4 – Breed names: 4a – Cavalier King Charles spaniel, 4b – English springer spaniel, 4c – miniature dachshund, 4d – Bernese mountain dog
5 – Breed is included in baseline category for this model
6 – Not applicable