Table 2.
Final multivariable model for risk factors associated with euthanasia in dogs under primary veterinary care in the UK during 2016 (n = 29,163). *Confidence interval.
| Variable | Category | Odds Ratio | 95% CI* | Category P-value | Variable P-value |
|---|---|---|---|---|---|
| Breed | Labrador Retriever | Base | < 0.001 | ||
| Rottweiler | 1.76 | 1.12 to 2.76 | 0.014 | ||
| Chihuahua | 1.06 | 0.66 to 1.71 | 0.809 | ||
| Boxer | 1.03 | 0.71 to 1.49 | 0.888 | ||
| Cocker Spaniel | 0.99 | 0.70 to 1.40 | 0.964 | ||
| Shih-tzu | 0.94 | 0.64 to 1.38 | 0.760 | ||
| Staffordshire Bull Terrier | 0.94 | 0.72 to 1.23 | 0.643 | ||
| Crossbreed | 0.93 | 0.75 to 1.15 | 0.512 | ||
| Golden Retriever | 0.90 | 0.57 to 1.40 | 0.627 | ||
| Jack Russell Terrier | 0.82 | 0.61 to 1.10 | 0.184 | ||
| Purebred—Other | 0.81 | 0.66 to 0.99 | 0.044 | ||
| German Shepherd Dog | 0.76 | 0.58 to 1.01 | 0.059 | ||
| Cavalier King Charles Spaniel | 0.73 | 0.54 to 0.98 | 0.034 | ||
| Border Collie | 0.63 | 0.45 to 0.87 | 0.005 | ||
| Yorkshire Terrier | 0.63 | 0.46 to 0.85 | 0.002 | ||
| West Highland White Terrier | 0.53 | 0.39 to 0.72 | < 0.001 | ||
| Pug | 0.47 | 0.30 to 0.75 | 0.001 | ||
| Bulldog | 0.32 | 0.23 to 0.47 | < 0.001 | ||
| Bodyweight (kg) | < 10 | Base | < 0.001 | ||
| 10 to < 20 | 1.05 | 0.90 to 1.24 | 0.515 | ||
| 20 to < 30 | 1.24 | 1.03 to 1.49 | 0.024 | ||
| ≥ 30 | 1.18 | 0.98 to 1.42 | 0.084 | ||
| Not recorded | 1.36 | 1.18 to 1.57 | < 0.001 | ||
| Age at death (years) | < 6 | Base | < 0.001 | ||
| 6 to < 9 | 1.38 | 1.18 to 1.62 | < 0.001 | ||
| 9 to < 12 | 2.16 | 1.87 to 2.50 | < 0.001 | ||
| 12 to < 15 | 3.82 | 3.28 to 4.44 | < 0.001 | ||
| ≥ 15 | 5.92 | 4.82 to 7.26 | < 0.001 | ||
| Vet Group | 1 | Base | < 0.001 | ||
| 2 | 0.75 | 0.67 to 0.83 | < 0.001 | ||
| 3 | 1.63 | 1.28 to 2.08 | < 0.001 | ||
| 4 | 1.23 | 1.08 to 1.39 | 0.002 | ||
| 5 | 0.45 | 0.28 to 0.74 | 0.002 | ||
| Grouped-level disorder | Neoplasia | Base | < 0.001 | ||
| Poor quality of life | 16.28 | 3.99 to 66.34 | < 0.001 | ||
| Undesirable behaviour | 11.36 | 4.93 to 26.16 | < 0.001 | ||
| Spinal cord disorder | 6.00 | 2.19 to 16.45 | < 0.001 | ||
| Inappetence | 2.67 | 1.07 to 6.62 | 0.035 | ||
| Mass | 2.13 | 1.34 to 3.40 | 0.001 | ||
| Musculoskeletal disorder | 1.72 | 1.04 to 2.85 | 0.035 | ||
| Kidney disease | 1.29 | 0.77 to 2.16 | 0.341 | ||
| Lethargy | 0.80 | 0.43 to 1.49 | 0.490 | ||
| Other | 0.76 | 0.57 to 1.01 | 0.056 | ||
| Collapsed | 0.59 | 0.44 to 0.80 | < 0.001 | ||
| Brain disorder | 0.53 | 0.39 to 0.72 | < 0.001 | ||
| Endocrine system disorder | 0.46 | 0.30 to 0.70 | < 0.001 | ||
| Enteropathy | 0.45 | 0.32 to 0.64 | < 0.001 | ||
| Haematopoietic disorder | 0.44 | 0.28 to 0.69 | < 0.001 | ||
| Lower respiratory tract disorder | 0.28 | 0.21 to 0.38 | < 0.001 | ||
| Upper respiratory tract disorder | 0.26 | 0.17 to 0.40 | < 0.001 | ||
| Foreign body | 0.18 | 0.10 to 0.34 | < 0.001 | ||
| Heart disease | 0.14 | 0.10 to 0.18 | < 0.001 | ||
| Complication associated with clinical care | 0.08 | 0.05 to 0.14 | < 0.001 | ||
| Not recorded | 0.08 | 0.06 to 0.10 | < 0.001 | ||
| Traumatic injury | 0.05 | 0.04 to 0.07 | < 0.001 |