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Table 3 Comparative prevalence values (%) for upper respiratory tract (URT) disorders recorded in 600 extreme brachycephalic (Bulldog, French Bulldog, Pug) and 600 other dogs (moderate brachycephalic: Yorkshire Terrier, non-brachycephalic: Border Terrier, West Highland White Terrier) attending primary-care veterinary practices in England (200 dogs of each breed type)

From: Epidemiological associations between brachycephaly and upper respiratory tract disorders in dogs attending veterinary practices in England

Variable Extreme brachycephalic (n = 600) No. (%) Moderate and non-brachycephalic (n = 600) No. (%) Overall P-value
Proportion of dogs with at least one URT disorder 132 (22.0) 58 (9.7) 190 (15.8) <0.001
Proportion of dogs with a URT disorder affecting this anatomic site     
Nares/Nasal Cavity 68 (11.3) 23 (3.8) 91 (7.6) <0.001
Hard and soft palate 19 (3.2) 0 (0.0) 19 (1.6) <0.001
Pharynx 8 (1.3) 4 (0.7) 12 (1.0) 0.246
Tonsil 3 (0.5) 1 (0.2) 4 (0.3) 0.317
Larynx 7 (1.2) 1 (0.2) 8 (0.7) 0.033
Trachea 30 (5.0) 38 (6.3) 68 (5.7) 0.318
BOAS (brachycephalic obstructive airway syndrome) 21 (3.5) 0 (0.0) 21 (1.8) <0.001
Multi-site URT 68 (11.3) 11 (1.8) 79 (6.6) <0.001