Prognostic Factors for Cancer-Specific Survival and Disease-Free Interval of Dogs with Mammary Carcinomas
Table 4
One-year corrected survival rates in 202 cases with available follow-up dataa.
Overall survival (n = 202)
n
Median survival (days)
Median 1-year survival rate n (%)
Age
≤9.0 years
30
1.095
16 (53.33%)
>9.0 years
65
365
18 (27.69%)
<0.001
Ovariohysterectomy (OHE)
No
173
730
68 (39.31%)
Yes
29
730
11 (37.93%)
0.355
Pseudocyesis
Absent
184
730
70 (38.04%)
Present
18
1.095
8 (44.44%)
0.039
Hormone administration
No
170
730
70 (41.18%)
Yes
32
730
9 (28.13%)
0.865
Clinical stage (TNM)
Initial (I–III)
170
730
72 (42.35%)
Advanced (IV–V)
32
365
15 (%)
0.031
Tumor size
T1 (<2 cm)
94
730
35 (37.23%)
T2 (2-3 cm)
45
730
18 (40%)
T3 (>3 cm)
63
730
26 (41.27%)
0.749
Histological type (n = 145)
Carcinoma in a mixed tumor
90
730
40 (44.44%)
Solid carcinoma
19
365
8 (42.11%)
Tubular carcinoma
36
730
12 (33.33%)
0.205
Histological grade (n = 186)
Grade I
66
1.095
16 (24.24%)
Grade II
77
730
35 (45.45%)
Grade III
43
365
20 (46.51%)
<0.001
Distant metastasis
No
186
730
75 (40.32%)
Yes
16
547
4 (25%)
0.143
Ulceration
Absent
153
730
65 (42.48%)
Present
49
730
14 (28.57%)
0.002
aSurvival values are percentages for cumulative survival determined by the log-rank test. Significance level adopted was .P values in bold indicate significance.
