Table 4.

Means ± SEM of body weight gains (kg) in pigs housed in four housing groups after the housing switch (at 47 days of age).

Period	B1B2	B1E2	E1B2	E1E2	H1	H2
Day 46–50	2.5 ± 0.2	2.6 ± 0.1	2.6 ± 0.3	2.8 ± 0.2	Ns	ns
Day 46–74	20.5 ± 0.8	21.7 ± 0.6	22.1 ± 0.9	23.4 ± 0.4	Ns	+
Day 74–109	37.5 ± 1.1	38.8 ± 1.6	37.3 ± 0.9	39.4 ± 1.3	Ns	ns
Day 109–130	23.4 ± 1.0	25.4 ± 1.8	21.9 ± 0.7	23.4 ± 1.0	*	*
Day 46–130	81.5 ± 1.3	85.9 ± 1.5	81.3 ± 1.2	86.1 ± 1.3	Ns	**

H1 indicates the effect of housing before the switch, and H2 indicates the effect of housing after the switch. No H1 × H2 interactions were found. Significances of differences are indicated: **p < 0.01, *p < 0.05, and ⁺p < 0.10; ns indicates non-significance.