Table 1 Descriptive and univariable logistic regression results for breed-related factors as predisposing factors for otitis externa during 2016 in dogs under primary veterinary care in the VetCompass™ Programme in the UK. Column percentages shown in brackets
Variable | Category | Case No. (%) | Non-case No. (%) | Odds ratio | 95% CIa | Category P-value | Variable P-value |
|---|---|---|---|---|---|---|---|
Purebred status | Crossbred | 302 (18.56) | 4408 (21.36) | Base | < 0.001 | ||
Designer | 133 (8.17) | 1162 (5.63) | 1.67 | 1.35–2.07 | < 0.001 | ||
Purebred | 1192 (73.26) | 15,064 (73.01) | 1.15 | 1.01–1.32 | 0.031 | ||
Breed | Crossbreed | 302 (18.52) | 4408 (21.29) | Base | < 0.001 | ||
Basset Hound | 17 (1.04) | 42 (0.20) | 5.91 | 3.32–10.50 | < 0.001 | ||
Chinese Shar Pei | 19 (1.16) | 88 (0.43) | 3.15 | 1.89–5.24 | < 0.001 | ||
Labradoodle | 31 (1.90) | 144 (0.70) | 3.14 | 2.10–4.71 | < 0.001 | ||
Beagle | 29 (1.78) | 168 (0.81) | 2.52 | 1.67–3.80 | < 0.001 | ||
Golden Retriever | 34 (2.08) | 207 (1.00) | 2.40 | 1.64–3.51 | < 0.001 | ||
Cockapoo | 62 (3.80) | 416 (2.01) | 2.18 | 1.63–2.91 | < 0.001 | ||
English Bulldog | 26 (1.59) | 183 (0.88) | 2.07 | 1.35–3.18 | 0.001 | ||
American Bulldog | 10 (0.61) | 71 (0.34) | 2.06 | 1.05–4.03 | 0.036 | ||
Cavapoo | 12 (0.74) | 92 (0.44) | 1.90 | 1.03–3.51 | 0.039 | ||
Pug | 47 (2.88) | 366 (1.77) | 1.87 | 1.35–2.59 | < 0.001 | ||
French Bulldog | 45 (2.76) | 353 (1.71) | 1.86 | 1.34–2.59 | < 0.001 | ||
West Highland White Terrier | 57 (3.49) | 459 (2.22) | 1.81 | 1.34–2.44 | < 0.001 | ||
Labrador Retriever | 154 (9.44) | 1308 (6.32) | 1.72 | 1.40–2.11 | < 0.001 | ||
Cocker Spaniel | 81 (4.97) | 690 (3.33) | 1.71 | 1.32–2.22 | < 0.001 | ||
Rottweiler | 18 (1.10) | 157 (0.76) | 1.67 | 1.01–2.76 | 0.044 | ||
Bichon Frise | 33 (2.02) | 303 (1.46) | 1.59 | 1.09–2.32 | 0.016 | ||
Boxer | 22 (1.35) | 223 (1.08) | 1.44 | 0.92–2.27 | 0.115 | ||
English Springer Spaniel | 40 (2.45) | 435 (2.10) | 1.34 | 0.95–1.89 | 0.094 | ||
Lhasa Apso | 25 (1.53) | 286 (1.38) | 1.28 | 0.83–1.95 | 0.261 | ||
Cavalier King Charles Spaniel | 34 (2.08) | 401 (1.94) | 1.24 | 0.86–1.79 | 0.258 | ||
Border Terrier | 20 (1.23) | 238 (1.15) | 1.23 | 0.77–1.96 | 0.395 | ||
German Shepherd Dog | 39 (2.39) | 507 (2.45) | 1.12 | 0.79–1.59 | 0.512 | ||
Shih Tzu | 52 (3.19) | 743 (3.59) | 1.02 | 0.75–1.38 | 0.891 | ||
Other purebreds | 250 (15.33) | 3764 (18.18) | 0.97 | 0.82–1.15 | 0.725 | ||
Staffordshire Bull Terrier | 79 (4.84) | 1225 (5.92) | 0.94 | 0.73–1.22 | 0.643 | ||
Jack Russell Terrier | 42 (2.58) | 1148 (5.55) | 0.53 | 0.38–0.74 | < 0.001 | ||
Yorkshire Terrier | 25 (1.53) | 740 (3.57) | 0.49 | 0.33–0.75 | 0.001 | ||
Border Collie | 14 (0.86) | 594 (2.87) | 0.34 | 0.20–0.59 | < 0.001 | ||
Chihuahua | 12 (0.74) | 943 (4.56) | 0.19 | 0.10–0.33 | < 0.001 | ||
Kennel Club Recognised Breed | Not recognised | 463 (28.46) | 5976 (28.96) | Base | 0.665 | ||
Recognised | 1164 (71.54) | 14,658 (71.04) | 1.02 | 0.92–1.15 | 0.666 | ||
Kennel Club Breed Group | Breed not Kennel Club recognised | 463 (28.46) | 5976 (28.96) | Base | < 0.001 | ||
Toy | 165 (10.14) | 3148 (15.26) | 0.68 | 0.56–0.81 | < 0.001 | ||
Utility | 222 (13.64) | 2296 (11.13) | 1.25 | 1.06–1.47 | 0.009 | ||
Terrier | 236 (14.51) | 3412 (16.54) | 0.89 | 0.76–1.05 | 0.171 | ||
Gundog | 340 (20.90) | 2945 (14.27) | 1.49 | 1.29–1.73 | < 0.001 | ||
Hound | 71 (4.36) | 727 (3.52) | 1.26 | 0.97–1.64 | 0.083 | ||
Pastoral | 66 (4.06) | 1259 (6.10) | 0.68 | 0.52–0.88 | 0.004 | ||
Working | 64 (3.93) | 871 (4.22) | 0.95 | 0.72–1.24 | 0.701 | ||
Ear carriage | Erect | 220 (13.49) | 3898 (18.83) | Base | < 0.001 | ||
Semi-erect | 276 (16.92) | 4654 (22.48) | 1.05 | 0.88–1.26 | 0.594 | ||
V-shaped drop | 299 (18.33) | 2734 (13.21) | 1.94 | 1.62–2.32 | < 0.001 | ||
Pendulous | 395 (24.22) | 3752 (18.12) | 1.87 | 1.57–2.21 | < 0.001 | ||
Variation | 441 (27.04) | 5664 (27.36) | 1.38 | 1.17–1.63 | < 0.001 | ||
Skull conformation | Dolichocephalic | 134 (8.24) | 1610 (7.81) | Base | 0.941 | ||
Mesocephalic | 754 (46.37) | 9587 (46.49) | 0.94 | 0.78–1.14 | 0.562 | ||
Brachycephalic | 303 (18.63) | 3866 (18.75) | 0.94 | 0.76–1.16 | 0.578 | ||
Not categorised | 435 (26.75) | 5559 (26.96) | 0.94 | 0.77–1.15 | 0.548 | ||
Poodle | Not poodle-type | 1188 (72.84) | 15,302 (73.92) | Base | < 0.001 | ||
Poodle-type | 137 (8.40) | 924 (4.46) | 1.91 | 1.58–2.31 | < 0.001 | ||
Not categorised | 306 (18.76) | 4476 (21.62) | 0.88 | 0.77–1.00 | 0.055 | ||
Spaniel | Non spaniel-type | 1152 (70.63) | 14,539 (70.23) | Base | < 0.001 | ||
Spaniel-type | 173 (10.61) | 1687 (8.15) | 1.29 | 1.09–1.53 | 0.003 | ||
Not categorised | 306 (18.76) | 4476 (21.62) | 0.86 | 0.76–0.98 | 0.027 |