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Siamese

origin: Thailand · 10 figures in the corpus · Q42604

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

11.69 years (life expectancy at age 0) verified

Siamese: years (life expectancy at age 0) (Teng KT, O'Neill DG, Brodbelt DC, Church DB, Pegram C)

  • Study sample n=88.
14.2 years (median age at death) verified

Siamese: years (median age at death) (O'Neill DG, Church DB, McGreevy PD, Thomson PC, Brodbelt DC)

  • Study sample n=31.

Causes of death

663 deaths per 10,000 cat-years at risk (ASMR) verified

Siamese group: age-standardized total mortality rate, Swedish insured cats (Egenvall 2009, Agria)

  • A rate, not a life expectancy -- higher ASMR means higher yearly death risk, not necessarily a shorter median lifespan.
  • Breed label 'Siamese group' does not map 1:1 onto a single roster breed.
8.3 percent stillborn verified

Siamese: stillbirth rate, UK pedigree litters (Sparkes et al. 2006)

  • Study sample n=138 litters.
9.7 percentage points dead between birth and 8 weeks verified

Siamese: birth-to-8-week kitten mortality, UK pedigree litters (Sparkes et al. 2006)

  • Study sample n=138 litters.

Breeding

4.83 mean kittens per litter verified

Balinese/ Siamese/Oriental/Havana: mean litter size (Cerna et al. 2024)

  • Study sample n=70 litters.
  • Study breed label 'Balinese/ Siamese/Oriental/Havana' pools variants or does not map 1:1 onto a single roster breed (e.g. joint shorthair/longhair or joint-breed labels in the source table).
20.0 percent of litters by caesarean section verified

Balinese/ Siamese/Oriental/Havana: caesarean-section rate (Cerna et al. 2024)

  • Study sample n=70 litters.
  • Study breed label 'Balinese/ Siamese/Oriental/Havana' pools variants or does not map 1:1 onto a single roster breed (e.g. joint shorthair/longhair or joint-breed labels in the source table).
17.8 percent cumulative kitten mortality to 12 weeks verified

Balinese/ Siamese/Oriental/Havana: cumulative kitten mortality to 12 weeks, stillbirths included (Cerna et al. 2024)

  • Study sample n=70 litters.
  • Study breed label 'Balinese/ Siamese/Oriental/Havana' pools variants or does not map 1:1 onto a single roster breed (e.g. joint shorthair/longhair or joint-breed labels in the source table).

Bodyweight

5.0 kg (adult bodyweight, Wikidata P2067) verified

Siamese: adult bodyweight

  • Wikidata mass is sparse and its own sourcing varies by item; treat as indicative, not a veterinary measurement. See bodyweight-vetcompass-* figures for breeds with a clinical-cohort measurement instead.

Category (FIFe)

4 FIFe category (1-4, coat/morphology grouping) verified

Siamese (SIA): FIFe Category 4

  • Category is a coat/morphology grouping FIFe itself uses, not a ranking (1=lowest number, 4=highest, no ordinal meaning).