Table 2. Attack rate and pooled Odds Ratio (OR), with corresponding 95% confidence interval (95% CI), of different risk factors for the tortoises exposed to TeHV3 infection.

Risk factor	cases and infected tortoises, n	not infected tortoises, n	total, n	Attack rate (%)	OR	95% CI	p-value
species
T. non-hermanni1	3	21	24	12,5	1	-	-
T. hermanni	17	43	60	28,3	2,77	0,73–10,5	0,16
gender
female1	8	19	27	29,6	1	-	-
male	12	9	21	57,1	3,17	0,96–10,57	0,05
not indentified#	0	36	36	0	na		na
age
<10 years1	2	42	44	4,5	1	-	-
≥10 years	18	22	40	45	17,18	3,65–80,88	<0,001
location of the 2012
other enclosures1	2	58	58	3,5	1	-	-
enclosure no.1*	10	0	11	90,9	156,4	6,92–2367	<0,001
enclosure no. 2†	8	7	15	53,3	20,67	3,89–109,6	<0,001
location of the 2013, initial phase
other enclosures1	0	62	62	0	1	-	-
enclosure no.1	7	0	0	100	68,92	3,68–1291	<0,001
enclosure no.2	3	2	5	60	5,47	0,84–35,42	0,08
enclosure no.3	3	0	3	100	22,59	1,08–472,7	0,01
enclosure no.4	7	0	7	100	68,92	3,68–1291	<0,001
location of the 2013, second phase
other enclosures1	0	62	62	0	1	-	-
enclosure no.1	1§	0	1	100	9,14	0,29–286,1	0,27
enclosure no.2	6§	2	8	75	20,67	3,6–118,5	<0,001
enclosure no.3	1§	0	1	100	9,14	0,29–286,1	0,27
enclosure no.4	7§	0	7	100	112	5,8–2165	<0,001

¹ Reference category.

na: not applied.

# The gender of the tortoises is not identified until they are 6 years old.

* All tortoises in this enclosure were male.

† All tortoises in this enclosure were female.

§The other infected tortoises were dead.