Table 4.

Effects of added fat and initial sort on growth performance of finishing pigs (experiment 2)¹

Added dietary fat:	0%			6%			Main effect P-value				Interaction P-value
Sort category:2	HEAVY	LIGHT	MIXED	HEAVY	LIGHT	MIXED	SEM	Fat	HEAVY vs.LIGHT	Sorted3 vs.MIXED	HEAVY vs. LIGHTby fat	Sorted vs. MIXEDby fat
Average daily gain, kg
day 0 to 49	0.83	0.79	0.81	0.86	0.83	0.85	0.010	0.01	0.01	0.89	0.40	0.81
day 49 to 81	0.94	0.93	0.93	0.95	0.96	0.95	0.058	0.16	0.96	0.80	0.77	0.83
day 81 to 95	1.02	0. 90	0.95	1.05	0.93	0.97	0.045	0.43	0.04	0.75	0.99	0.88
Overall	0.88	0.85	0.87	0.91	0.89	0.90	0.008	0.01	0.02	0.91	0.37	0.89
Average daily feed intake, kg
day 0 to 49	2.12	1.93	2.03	1.98	1.80	1.90	0.025	0.01	0.01	0.83	0.84	0.99
day 49 to 81	2.64	2.49	2.57	2.45	2.28	2.36	0.032	0.01	0.01	0.94	0.82	0.84
day 81 to 95	3.07	2.83	2.99	2.89	2.57	2.68	0.048	0.01	0.01	0.99	0.40	0.26
Overall	2.70	2.28	2.46	2.51	2.09	2.27	0.025	0.01	0.01	0.25	0.91	0.97
Gain:feed ratio
day 0 to 49	0.39	0.41	0.40	0.43	0.46	0.45	0.005	0.01	0.01	0.93	0.30	0.67
day 49 to 81	0.35	0.37	0.36	0.39	0.42	0.41	0.009	0.01	0.01	0.78	0.75	0.52
day 81 to 95	0.33	0.32	0.32	0.36	0.36	0.36	0.012	0.01	0.86	0.75	0.67	0.86
Overall	0.36	0.38	0.37	0.41	0.43	0.42	0.004	0.01	0.01	0.68	0.28	0.83

¹A total of 1,176 gilts (28 pigs per pen and 7 pens per treatment) with an initial average weight of 35.1 kg.

²Pigs were sorted based on body weight at placement. HEAVY, pig from the heaviest 50% of the population; LIGHT, pig from the lightest 50% of the population; MIXED, pigs from the whole population with normal distribution around body weight mean.

³Mean of combined HEAVY and LIGHT treatment groups.