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Staffordshire Bull Terrier
origin: England · 12 figures in the corpus · Q39285
Every figure below carries this breed's name or id in its source study -- grouped by what it measures, not ranked. A breed appearing under a study here does not mean every other breed was tested and came back negative; it means this is what has a named source so far. See each figure's own page for its caveats.
Longevity
Staffordshire Bull Terrier: median survival age, UK veterinary clinic population
- UK primary-care veterinary clinic population (VetCompass), not a census of all dogs of the breed.
- Hazard ratio vs. the crossbred reference group: 1.13 (95% CI 1.11-1.14, p<0.001).
Staffordshire Bull Terrier: life expectancy at birth, UK veterinary clinic population
- UK primary-care veterinary clinic population (VetCompass), not a census of all dogs of the breed.
- Life expectancy at birth (cohort life-table method), a different statistic from a Kaplan-Meier median survival age -- do not compare directly against McMillan 2024's figures.
Size & head shape
Staffordshire Bull Terrier: body size class -- Small
- Body size and cephalic index classification per Supplementary Table S5; for breeds absent from the study's primary source lists, assigned by majority agreement among Dogs Trust canine-behaviour experts rather than measured directly on dogs.
Staffordshire Bull Terrier: head-shape (cephalic index) classification -- Mesocephalic
- Body size and cephalic index classification per Supplementary Table S5; for breeds absent from the study's primary source lists, assigned by majority agreement among Dogs Trust canine-behaviour experts rather than measured directly on dogs.
OFA (hip & elbow)
Staffordshire Bull Terrier: hip evaluations rated dysplastic (mild/moderate/severe combined), OFA cumulative statistics
- OFA is a voluntary-submission registry: owners/breeders choose whether to have a dog evaluated and whether to submit the result, so this is not a random sample of the breed and most likely understates true population prevalence.
Staffordshire Bull Terrier: elbow evaluations rated abnormal (grade 1-3 combined), OFA cumulative statistics
- OFA is a voluntary-submission registry: owners/breeders choose whether to have a dog evaluated and whether to submit the result, so this is not a random sample of the breed and most likely understates true population prevalence.
Temperament
Staffordshire Bull Terrier: share of surveyed dogs scored high on the Fear trait (Salonen 2020, Finnish pet dogs)
- Self-selected online convenience sample of Finnish pet owners, not a random sample of the breed or of all dogs.
- Restricted to breeds with at least 50 surveyed dogs to avoid small-sample noise.
Staffordshire Bull Terrier: share of surveyed dogs scored high on the Noise sensitivity trait (Salonen 2020, Finnish pet dogs)
- Self-selected online convenience sample of Finnish pet owners, not a random sample of the breed or of all dogs.
- Restricted to breeds with at least 50 surveyed dogs to avoid small-sample noise.
Other
Staffordshire Bull Terrier: purpose class 'hunting: terrier', from FCI group: Terriers
- Registry group membership at time of the source table, not an independent behavioural assessment.
Staffordshire Bull Terrier (Terrier group): UK Kennel Club new registrations, 2025; +27.6% vs 2016
- UK-only; a breed with 0 or blank registrations in a year may be newly recognised, temporarily unregistered, or genuinely absent that year -- the source table does not distinguish these.
Staffordshire bull terrier: average litter size, Danish Kennel Club registrations Aug 2022-Jul 2023