Table 5.

Factor associated with the percentage of condemnations of 13,581 truckloads of broilers raised by one of Thailand's largest broiler producers without an antibiotic program and slaughtered in 2021.

Variable	Estimates1	SE	Statistic	P-value	95% confidence interval
Season
Winter	0.386	0.022	17.994	<0.001	0.3440	0.4280
Summer	−0.054	0.022	−2.478	0.013	−0.0114	−0.0973
Rainy	Ref
Time of transport2
Night	−0.020	0.014	−1.413	0.158	−0.0479	−0.0077
Morning	−0.078	0.027	2.934	0.003	−0.1300	−0.0250
Day	Ref
Sex
Male	0.200	0.023	8.673	<0.001	0.1540	0.2460
Female	−0.139	0.023	−6.076	<0.001	−0.1840	−0.0944
Mixed sex	Ref
Age
40–43 d	−0.815	0.039	−20.667	<0.001	−0.8920	−0.7380
44–47 d	−0.783	0.037	−21.226	<0.001	−0.8550	−0.7110
48–51 d	−0.443	0.064	−6.894	<0.001	−0.5680	−0.3170
52–55 d	−0.446	0.119	−3.737	<0.001	−0.6800	−0.2120
56–71 d	Ref
Mean body weight (g)	−0.0005	0.0001	−11.071	<0.001	−0.0006	−0.0004
Rearing stocking density (kg /m2)	0.0186	0.0042	4.400	<0.001	0.0103	0.0269
Mortality and culling (%)	0.0617	0.0039	15.831	<0.001	0.0540	0.0693
Weight per crate (kg)	0.0277	0.0051	5.418	<0.001	0.0177	0.03777
Feed withdrawal time (min)	0.0014	0.0000	16.136	<0.001	0.0012	0.0015

Intraclass correlation coefficient (ICC) = 0.09.

¹Estimates (β) indicate how likely an outcome is to occur in one context relative to another or one unit increase or decrease in the predictor to a β value increase or decrease in the outcome.

²Time of transport (night = 18:00–04:00, morning = 04:00–08:00, day = 8:00–8:00).