Table 4 Results for risk factors that directly replaced the breed variable in the final breed-focused mixed effects multivariable logistic regression model (along with age, bodyweight relative to breed mean, sex and insurance status). Adult (> 18 months) bodyweight (kg) replaced the breed and bodyweight relative to breed mean variables in the final breed-focused mixed effects multivariable logistic regression model. These results report associations between these predisposing factors and otitis externa in dogs under primary veterinary care in the VetCompass™ Programme in the UK. Clinic attended was included as a random effect
Variable | Category | Odds ratio | 95% CIa | Category P-value |
|---|---|---|---|---|
Purebred status | Crossbred | Base | ||
Designer | 1.63 | 1.31–2.03 | < 0.001 | |
Purebred | 1.13 | 0.99–1.29 | 0.060 | |
Kennel Club Breed Group | Breed not Kennel Club recognised | Base | ||
Toy | 0.68 | 0.56–0.81 | < 0.001 | |
Utility | 1.25 | 1.05–1.47 | 0.011 | |
Terrier | 0.88 | 0.75–1.04 | 0.143 | |
Gundog | 1.42 | 1.23–1.65 | < 0.001 | |
Hound | 1.23 | 0.94–1.60 | 0.128 | |
Pastoral | 0.67 | 0.52–0.88 | 0.004 | |
Working | 0.94 | 0.72–1.24 | 0.672 | |
Ear carriage | Erect | Base | ||
Semi-erect | 1.03 | 0.86–1.24 | 0.757 | |
V-shaped drop | 1.84 | 1.53–2.21 | < 0.001 | |
Pendulous | 1.76 | 1.48–2.10 | < 0.001 | |
Variation | 1.36 | 1.15–1.60 | < 0.001 | |
Poodle | Not poodle-type | Base | ||
Poodle-type | 1.91 | 1.57–2.32 | < 0.001 | |
Not categorised | 0.90 | 0.79–1.03 | 0.117 | |
Spaniel | Non spaniel-type | Base | ||
Spaniel-type | 1.24 | 1.05–1.47 | 0.013 | |
Not categorised | 0.88 | 0.77–1.00 | 0.054 | |
Adult (> 18 months) bodyweight (kg) | < 10.0 | Base | ||
10.0 - < 15.0 | 1.97 | 1.66–2.35 | < 0.001 | |
15.0 - < 20.0 | 1.58 | 1.28–1.94 | < 0.001 | |
20.0 - < 25.0 | 1.65 | 1.34–2.04 | < 0.001 | |
25.0 - < 30.0 | 1.59 | 1.27–1.99 | < 0.001 | |
30.0 - < 40.0 | 2.05 | 1.69–2.48 | < 0.001 | |
≥ 40.0 | 2.35 | 1.80–3.07 | < 0.001 | |
Unavailable | 0.99 | 0.83–1.17 | 0.874 |