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Table 1 Demographic comparison between two breed groups of 600 extreme brachycephalic (Bulldog, French Bulldog, Pug) and 600 moderate and non-brachycephalic dogs (moderate: Yorkshire Terrier, non-brachycephalic: Border Terrier and West Highland White Terrier) attending primary-care veterinary practices in England (200 dogs of each breed type)
| Variable | Category | Extreme brachycephalic No. (%) | Moderate and non-brachycephalic No. (%) | Overall | P-value |
|---|---|---|---|---|---|
| Sex/neuter | Female entire | 236 (40.0) | 160 (26.7) | 396 (33.3) | <0.001 |
| Female neutered | 43 (7.3) | 115 (19.2) | 158 (13.3) | ||
| Male entire | 269 (45.6) | 211 (35.2) | 480 (40.3) | ||
| Male neutered | 42 (7.1) | 114 (19.0) | 156 (13.1) | ||
| Insured | Insured | 103 (17.2) | 159 (26.5) | 262 (21.8) | <0.001 |
| Not insured | 497 (82.8) | 441 (73.5) | 938 (78.2) | ||
| Bodyweight (kg): Median (IQRa, range) | 12.4 (9.5–24.2, 1.6–41.0) | 8.7 (5.9–10.5, 1.5–20.7) | 9.7 (7.6–12.2, 1.5–41.0) | <0.001 | |
| Age (years) at final EPRb: Median (IQRa, range) | 1.5 (0.4–3.5, 0.0–14.0) | 5.5 (2.5–10.2, 0.0–18.2) | 3.1 (1.0–7.1, 0.0–18.2) | <0.001 | |
| Time in study (years): Median (IQRa, range) | 0.2 (0.0–1.1, 0.0–4.3) | 0.9 (0.0–2.4, 0.0–5.0) | 0.4 (0.0–1.8, 0.0–5.0) | <0.001 |
