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Table 3 Frequency of MCT grade by age, size and sex

From: Epidemiological assessment of the risk of canine mast cell tumours based on the Kiupel two-grade malignancy classification

Variable All MCTs Kiupel grade Control groupb
Low High
Age (years)
 0–3 15 11 4 398
3.0% 2.9% 3.3% 17.5%
 4–6 127 110 17 466
25.8% 29.4% 14.2% 20.5%
 7–10 262 210 52 928
53.2% 56.3% 43.7% 40.8%
 11–16 88 42 46 479
17.8% 11.2% 38.6% 21.0%
 M ± SD 8.09 ± 2.72 7.64 ± 2.42 9.52 ± 3.10 7.44 ± 3.73
Sizea
 Small 65 46 19 474
19.0% 17.0% 26.7% 30.0%
 Medium 207 172 35 510
60.7% 63.7% 49.3% 32.3%
 Large 69 52 17 594
20.2% 19.2% 23.9% 37.6%
Sex
 Male 274 205 69 1444
55.6% 54.9% 57.9% 63.5%
 Female 218 168 50 827
44.3% 45.0% 42.0% 36.4%
Total 492 373 119 2271
  1. M mean, SD standard deviation
  2. aThe analysis did not take into account crossbreed dogs, whose size was not recognized
  3. bTotal number of dogs with other skin tumours of a given age, size and sex