Table 4.

Effect of stocking density on postweaning mortality

		Weight, kg
Article	Outcome measured	Start	End	No. of stocking densities	High stocking density, m2	Low stocking density, m2	Statistical interpretation1
Brumm et al. (1996) experiment 1	Dead/ removed	21	111	2	0.56	0.78	+
Brumm et al. (1996) experiment 2	Dead/ removed	23	107	2	0.56	0.78	NS
Brumm et al. (1996) experiment 3	Dead/ removed	21	106	2	0.56	0.78	NS
Turner et al. (2000)	Removed	30	60	2	50 kg/m2	32 kg/m2	NS
Brumm et al. (2001) 2	Dead/ removed	7	20	2	0.16	0.25	NS
Brumm et al. (2001) 3	Dead/ removed	20	110	2	0.56	0.78	NS
Brumm et al. (2001) 4	Dead/ removed	5	22	2	0.16	0.23	NS
Brumm et al. (2001) 5	Dead/ removed	22	110	2	0.60	0.74	NS
Wolter et al. (2002) Study 1	Removed	6	41	2	0.33	0.65	NS
Wolter et al. (2002) Study 2	Removed	5	43	2	0.33	0.65	NS
Hamilton et al. (2003)	Mortality, morbidity	41	120	2	0.37 m2 to 80 kg, 0.56 m2 after	0.93	~
Morrison et al. (2003)	Mortality	24	104	2	0.45 m2 wk. 10 to 13, 0.55 m2 wk. 14 to 16, 0.74 m2 wk. 17 to 23	0.88	NS
Wolter et al. (2003a)	Removed	6	57	2	0.32	0.63	+
Wolter et al. (2003b) 6	Removed	5	28	2	0.21	0.63	+
Brumm (2004) experiment 1	Dead/ removed	23	115	2	0.58 barrows, 0.65 gilts	0.65 barrows, 0.74 gilts	NS
Brumm (2004) experiment 2	Dead/ removed	5	124	2	0.58	0.74	NS
DeDecker et al. (2005)	Combined morbidity/ mortality	5	117	3	0.55	0.80	+
Street and Gonyou (2008)	Injury scores, Removed, medicated	37	94	2	0.52	0.78	NS
Jensen et al. (2012)	Mortality	31	91	3	0.67	0.79	NS
Serrano et al. (2013)	Mortality	19	110	2	0.76	0.84	NS
Stojanac et al. (2014)	Mortality	7	22	3	0.16	0.32	+
Jang et al. (2017)	Mortality	30	98	3	0.69	0.96	N/A
Johnston et al. (2017)	Dead, removed, treated, lameness, lesions	27	139	5	0.71	1.07	~
Callahan et al. (2017)	Mortality	6	26	2	0.15	0.27	NS
Wastell et al. (2018)	Dead/ removed	28	129	2	0.65	0.78	NS
Mehling et al. (2019)	Mortality	7	115	3	0.62	0.69	+

¹ P < 0.05 represented by +; 0.05 < P ≤ 0.10 represented by ~; P > 0.10 represented by NS; N/A indicates statistical analysis was not provided in publication.

² Nursery portion of experiment 1 as described by Brumm et al. (2001).

³ Grow-finish portion of experiment 1 as described by Brumm et al. (2001).

⁴ Nursery portion of experiment 2 as described by Brumm et al. (2001).

⁵ Grow-finish portion of experiment 2 as described by Brumm et al. (2001).

⁶ Study was designed with an early wean-finish (5 to 28 kg BW) and late wean-finish (28 to 114 kg BW) periods. Space restriction (0.21 m²) was applied during the first 8 weeks to one group, and both groups had 0.63 m² from week 9 until marketing.