Table 2.

The distribution and unconditional generalized ordered logistic regression odds ratio and p-value for each variable considered for inclusion in the final model.

Variable	Frequency	(%)	Low Severity (Level 1 and 2)	Medium Severity (Level 3)	High Severity (Level 3.5, 4, 5)	Unconditional Generalized Ordered Logistic Regression (OR)	2p-Value
*~ Incident Location:							<0.0001
In house	227	8	22	110	95	Baseline
Off-leash park	161	6	57	87	17	0.18	<0.001
Owner’s property	437	16	176	183	78	NPL
Public	1888	70	1136	575	177	NPL
* Victim age							0.0056
Child (0–12)	455	17	202	166	87	Baseline	-
Youth (13–19)	157	6	71	66	20	0.86	0.40
Adult (20–59)	1662	61	904	569	189	0.63	<0.001
Older adult (60+)	304	11	137	114	53	0.95	0.70
Unknown	135	5	77	40	18	0.60	0.008
*~ Dog sex:							<0.0001
Female-intact	263	10	160	71	32	Baseline	-
Male-intact	501	18	253	158	90	1.54	0.004
Male-neutered	1050	39	450	445	155	NPL
Female-spayed	525	199	315	154	56	1.00	0.97
Unknown	374	14	213	127	34	NPL
* Dog age:							0.0001
0–2	762	28	428	239	95	Baseline	-
3–6	1008	37	502	358	148	1.28	0.008
7+	522	19	227	217	78	1.55	<0.001
Unknown	421	16	234	141	46	0.99	0.96
* City quadrant:							0.07
Northeast	528	23	287	170	71	Baseline	-
Northwest	732	31	370	257	105	1.15	0.21
Southeast	537	23	249	198	90	1.37	0.008
Southwest	528	23	257	204	67	1.18	0.16
*~ Year:							<0.0001
2012	325	12	134	147	44	NPL
2013	360	13	165	142	53	1.17	0.25
2014	511	19	260	182	69	0.98	0.87
2015	523	19	280	186	57	0.86	0.23
2016	548	20	320	158	70	0.75	0.02
2017	446	16	232	140	74	Baseline	-
* Month:							0.16
January	160	6	83	60	17	Baseline	-
February	135	5	67	44	24	1.22	0.37
March	187	7	87	73	27	1.26	0.25
April	254	9	147	74	33	0.85	0.41
May	259	9	124	101	34	1.18	0.38
June	365	13	201	118	46	0.93	0.70
July	295	11	142	111	42	1.2	0.33
August	290	11	142	107	41	1.17	0.41
September	255	9	147	79	29	0.84	0.36
October	239	9	117	90	32	1.15	0.47
November	145	5	71	56	18	1.13	0.57
December	129	5	63	42	24	1.27	0.29
* Prior aggression							0.07
No	1817	67	932	885		Baseline	-
Yes	418	15	197	221		1.18	0.12
Unknown	478	18	262	216		0.87	0.17
^ Victim Gender							0.41
Male	1349	50	675	498	176	1.06	041
Female	1364	50	716	457	191	Baseline	-
*~ Breed group:							0.006
Herding	630	23	315	234	81	0.83	0.18
Hound	66	2	31	32	3	0.79	0.35
Non-sporting	251	9	111	107	33	Baseline
Sporting	435	16	254	133	48	0.60	0.001
Terrier	618	23	334	189	95	NPL
Toy	155	6	72	72	11	0.83	0.35
Working	558	21	274	188	96	NPL
^ Circumstances:
At large	1525	56	1011	385	129
Contained	111	4	30	43	38
Dog fight	82	3	13	41	28
Guard dog	2	0	0	1	1
Multi-dog	153	6	120	25	8
On leash	243	9	78	136	29
Other	444	16	115	242	87
Provoked	81	3	7	48	26
Tethered	65	2	14	30	21
Unknown	7	0	3	4	0
1^ Ward
1	149	5.5	72	59	18
2	145	5	71	58	16
3	166	6	86	60	20
4	179	7	83	67	29
5	244	9	118	88	38
6	113	4	59	44	10
7	117	4	55	42	20
8	100	4	46	38	16
9	241	9	111	89	41
10	259	10	120	90	49
11	154	6	86	55	13
12	179	7	107	50	22
13	130	5	83	27	20
14	149	5.5	66	62	21
Out of town/Unknown	388	14	228	126	34
^ Controlled by:
Child	68	2.5	23	30	15
Family	264	10	109	121	34
Friend	128	5	64	51	13
None	881	32	598	198	85
Owner	1318	46	567	539	212
Professional	31	1	11	13	7
Unknown	23	1	19	3	1
^ Relationship with dog:
Family	122	4.5	12	53	57
Guest	88	3	11	37	40
Neighbour	722	27	458	194	70
None	1504	55	769	564	171
Service provider	277	10	141	107	29
^1 Where obtained:
Breeder	289	11	153	103	33
Other	474	17	225	164	85
Rescue/Shelter	222	8	104	85	33
Unknown	1728	64	909	603	216
^1 Vaccination status:
Not vaccinated	469	17	256	149	64
Vaccinated	1144	42	510	456	178
Unknown	1100	41	626	350	125
^1 Licence status
No licence	611	23	306	215	90
Licence	1128	42	607	362	159
Unknown	974	36	478	378	118
^1 Years owned the dog:
Less than 1 year	187	7	100	54	33
1–3 years	419	15	216	142	61
3–5 years	207	8	111	74	22
5+ years	212	8	94	86	32
Unknown	1688	62	870	599	219

* Variables included in the model building process; ^{^} Variables not included in the model building process; ¹ Data not collected in all years, therefore where data was not available the outcome is unknown. Due to the large number of unknowns in these categories they were not further assessed; ² An overall p-value for each categorical variable assessed in an unconditional association is provided, as well as the p-value for each category within the predictor. For the unconditional associations, an odds ratio and p-value are not provided for categories within a predictor if the category did not meet the assumptions for parallel lines (NPL). Where that predictor was subsequently significant in the final model, the associated odds ratios and p-values are reported (Table 3); ^~ NPL = non-parallel lines. Model assumptions for parallel lines were not met.