Post-weaning diarrhea in pigs weaned without medicinal zinc: risk factors, pathogen dynamics, and association to growth rate

Table 6 Estimates from a Cox proportional hazards model exploring the hazard of developing post-weaning diarrhea

	Hazard ratio	Std. err	p value	95% conf. interval
Birth weight
Normal–high (1110–2080 g)	1.00	(Base)
Low (540–1100 g)	2.30	0.57	0.001	1.41	3.74
Time of weaning
Weaned at day of insertion to nursery	1.00	(Base)
Weaned in the farrowing unit, 0–7 days post insertion	0.11	0.06	2.3e⁻⁵	0.04	0.30
Weaned in the farrowing unit, 8–13 days post insertion	0.84	0.26	0.569	0.46	1.53
Dam parity	0.88	0.05	0.041	0.78	0.99
Pen in the nursery (producer, mean body weight at insertion)
1 (A, 8.1 kg)	1.00	(base)
2 (A, 6.5 kg)	0.53	0.24	0.153	0.22	1.27
3 (A, 4.2 kg)	0.16	0.08	3.5e⁻⁴	0.06	0.44
4 (A, 5.5 kg)	0.61	0.23	0.196	0.28	1.29
5 (B, 4.8 kg)	0.82	0.31	0.605	0.39	1.73
6 (B, 6.5 kg)	0.62	0.23	0.199	0.30	1.29
7 (B, 6.5 kg)	0.82	0.32	0.607	0.39	1.74
8 (B, 8.4 kg)	1.18	0.42	0.652	0.58	2.39

Piglets (n = 251) were followed during first 14 days after insertion in two nursery units at commercial Danish indoor producers

ISSN: 2055-5660