Table 1. Canine patient characteristics.

Variable	Group 1 (intent to treat) (n = 31)	Group 2 (vaccinated) (n = 19)	Group 3 (control) (n = 64)	P-value (Group 2 vs. 3)
Age (yrs; mean ± SD)	8.03 (2.7)	7.6 (2.7)	7.33 (2.7)	0.73
Body weight (kg; mean ± SD)	32.9 (13.5)	33.1 (12.7)	32.3 (13.1)	0.82
Stage	n (%)	n (%)	n (%)	0.43
II–IV	17 (54.8%)	9 (47.4%)	27 (42.2%)
V	14 (45.2%)	10 (52.6%)	37 (57.8%)
Sub-stage	n (%)	n (%)	n (%)	0.112
a	21 (67.7%)	14 (73.7%)	35 (54.7%)
b	10 (32.3%)	5 (26.3%)	29 (45.3%)
Immunophenotype	n (%)	n (%)	n (%)	0.45
B	21 (67.7%)	14 (73.7%)	33 (78.6%)
T	10 (32.3%)	5 (26.3%)	9 (21.4%)