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Table 1 Epidemiological characteristics of « Mammary cancer » versus « Non cancer » or « Benign mammary tumor » dog subgroups (Difference with p-value >0.05 is non-significant)

From: Pollutants in pet dogs: a model for environmental links to breast cancer

Characteristics 54 Cancer (a) 47 Non cancer (b)   30 Benign tumor (c)  
Characteristics Mean ± SD Mean ± SD p-value (d) Mean ± SD p-value (e)
Age (year) 10 ± 2.7 10 ± 2.5 0.104 10 ± 2.5 0.185
Weight (kg) 16.9 ± 14.4 18.5 ± 11.6 0.282 15.1 ± 10.4 0.275
Canine equivalent for BMI 5.5 ± 1.4 5.4 ± 1.1 0.714 5.5 ± 1.3 0.780
Lipids % in sample 57.6 ± 15.3 58.8 ± 15.9 0.613 58.6 ± 15.3 0.835
Lipids weight in sample (g) 0.711 ± 0.350 0.698 ± 0.353 0.826 0.741 ± 0.384 0.827
Other characteristics Frequency Frequency   Frequency  
Physical activity (per week)      
▪ 0-1h 47% 27%   30%
▪ 1-2h 23% 21%   21%
▪ 2-5h 18% 30%   30%
▪ >5h 12% 22%   19%
Pet food      
▪ Supermarket 83% 85%   84%
▪ Veterinary 17% 15%   16%
▪ Dry food 72% 73%   73%
▪ Humid food 28% 27%   27%
▪ + Leftovers 71% 70%   70%
Living place      
▪ Countryside 56% 52%   55%
▪ Urban area 23% 33%   31%
▪ Downtown 21% 15%   14%
Smoking owner      
▪ No smoker 68% 73%   72%
▪ Outside 20% 18%   21%
▪ Inside 12% 9%   7%
Number of litter      
▪ 0 72% 64%   61%
▪ 1 13% 17%   21%
▪ ≥2 15% 19%   18%
Ovariectomy 23% 47%   26%  
  1. aMammary cancer.
  2. bNon cancer.
  3. cBenign mammary tumors.
  4. dMammary cancer vs. Non cancer.
  5. eMammary cancer vs. Benign mammary tumors.