Table 2.

Unconditional associations between pre-surgical euthanasia status and each of the explanatory variables included in this study.

Risk factor	Euthanized			Riska	OR (95% CI)	p valueb
	Yes	No	Total
Insurance status
No	77	132	209	36.8	5.4 (2.0 to 14)	<0.0001
Yes	5	46	51	9.8	Reference
Total	82	178	260
Deposit (percent of quote)
≥50%	75	138	213	35.2	2.9 (1.3 to 6.9)	0.0128
<50%	7	38	45	15.6	Reference
Missing	0	2	2
Total	82	178	260
Payment plan available
No	80	167	247	32.3	1.8 (0.5 to 6.3)	0.2987
Yes	2	9	11	18.2	Reference
Missing	0	2	2
Total	82	178	260
State
VIC	75	154	229	32.8	1.7 (0.70 to 4.0)	0.3066
NSW	7	24	31	22.6	Reference
Total	82	178	260
Year
2018	50	99	149	33.6	1.2 (0.73 to 2.1)	0.5001
2017	32	79	111	28.8	Reference
Total	82	178	260
Breed
Mixed	15	26	41	36.6	1.3 (0.65 to 2.6)	0.4671
Purebred	67	152	219	30.6	Reference
Total	82	178	260
Sex
Female	33	47	80	41.3	1.8 (1.0 to 3.2)	0.0405
Male	45	118	163	27.6	Reference
Missing	4	13	17
Total	82	178	260
Age category
Geriatric	45	38	83	54.2	4.5 (2.5 to 7.9)	<0.0001
Non-geriatric	37	140	177	20.9	Reference
Total	82	178	260
Comorbidities
Yes	24	48	72	33.3	1.1 (0.62 to 2.0)	0.7762
Not recorded	58	129	187	31.0	Reference
Missing	0	1	1
Total	82	178	260
Lactate
Not recorded	52	39	91	57.1	11 (5.2 to 23)	<0.0001
High	18	44	62	29.0	3.2 (1.7 to 6.6)	0.004
Low	12	95	107	11.2	Reference
Total	82	178	260

^aNumber of dogs euthanized per 100 dogs at risk.

^bLikelihood ratio test.