Prognostic Factors for Cancer-Specific Survival and Disease-Free Interval of Dogs with Mammary Carcinomas
Table 1
Epidemiological information and clinical staging of female dogs diagnosed with mammary gland tumors.
Benign neoplasms (n = 16)
Malignant neoplasms (n = 342)
Age
≤9.0 years
11 (68.75%)
163 (47.66%)
0.237
>9.0 years
5 (31.25%)
174 (50.88%)
Undefined
0
5 (1.46%)
Breed
Mixed-breed
4 (25%)
114 (33.33%)
0.488
Purebred
12 (75%)
228 (66.67%)
Weight
≤10 kg
12 (75%)
207 (60.53%)
0.034
>10 kg
4 (25%)
135 (39.47%)
BCS
1
0
1 (0.29%)
0.402
2
0
16 (4.69%)
3
8 (50%)
222 (65.1%)
4
7 (43.75%)
79 (23.17%)
5
1 (6.25%)
23 (6.74%)
Type of food
Homemade food
0
14 (4.09%)
0.379
Commercial diets
9 (56.25%)
157 (45.91%)
Commercial diets + meat
1 (6.25%)
5 (1.46%)
Commercial diets + homemade food
5 (31.25%)
107 (31.29%)
Commercial diets + snack
1 (6.25%)
59 (17.25%)
Ovariohysterectomy (OHE)
No
13 (81.25%)
292 (85.38%)
0.649
Yes
3 (18.75%)
50 (14.62%)
Pseudocyesis
Absent
15 (93.75%)
298 (87.13%)
0.435
Present
1 (6.25%)
44 (12.87%)
Received unknown hormonal contraceptive agents
No
12 (75%)
283 (82.75%)
0.426
Yes
4 (25%)
59 (17.25%)
History of previous disease
Denied
10 (62.5%)
265 (77.49%)
0.075
Mammary neoplasm
4 (25%)
61 (17.84%)
Pyometra
1 (6.25%)
14 (4.09%)
TVT
1 (6.25%)
2 (0.58%)
Surgical technique
Lumpectomy
1 (6.25%)
21 (6.14%)
0.544
Regional mastectomy
6 (37.5%)
129 (37.72%)
Radical mastectomy
6 (37.5%)
163 (47.66%)
Combination of techniques
3 (18.75%)
29 (8.48%)
Concomitant OHE
No
11 (68.75%)
234 (68.42%)
0.978
Yes
5 (31.25%)
108 (31.58%)
BCS, body condition score; TVT, transmissible venereal tumor. Similar group characteristics are verified by nonsignificant using the chi-square test on categorized variables.
