Table 3.

Factors associated with mortality and lightweight at week 10 for nursery pigs at a farm in Iowa, 2002

Response variableb	Risk factora	Odds ratio	−+95 % CI	P
Mortality	Weaning weight (≤ 3.6 kg vs > 3.6 kg)	2.92	1.87–4.56	0.0001
	Barrow (barrow vs gilt)	1.75	1.13–2.70	0.01
	Sow unit (A vs B)	2.14	1.01–4.56	0.04
	Weaning age (≤ 17 d vs > 17 d)	0.87	0.72–1.06	0.1706
Light weight at 10 wk of aged	Weaning weight (≤ 3.6 kg vs > 3.6 kg)	8.75	5.84–13.12	0.0001
	Birth weight (≤ 1 kg vs > 1 kg)	2.66	1.75–4.04	0.0001
	Gilt (gilt vs barrow)	1.40	0.96–2.04	0.07
	Sow unit (A vs B)	2.38	1.49–3.70	0.0002
	Gilt (gilt vs sow at weaning)c	1.66	1.08–2.56	0.01
	Weaning age (≤ 17 d vs > 17 d)	1.05	0.94–1.17	0.34

^aOdds ratio effects are adjusted for remaining factors

^bBoth logistic models included litter as random effect (Glimmix macro; SAS)

^cParity of the nursing sow at weaning regardless of the cross fostering status

^dLess than or equal to 14.5 kg