Table 5.

Average fixed effects of Improvest [immunologically castrated barrows (IC)– physically castrated barrows (PC)] on loin cut-out values from a summary of previously reported data^1,2

Item	IC	PC	Effect IC- PC	95% CI	SED	P-value
Ft backkg	2.67	3.05	−0.38	(−0.74, −0.02)	0.14	0.04
% chilled side wt	5.39	6.11	−0.72	(−1.36, −0.09)	0.25	0.03
Canadian back, kg	3.73	3.60	0.13	(−0.02, 0.28)	0.07	0.09
% chilled side wt	8.02	7.74	0.28	(0.05, 0.50)	0.11	0.02
% trimmed loin	34.90	34.28	0.62	(0.05, 1.20)	0.29	0.04
Tenderloin, kg	0.48	0.46	0.02	(−0.01, 0.04)	0.01	0.18
% chilled side wt	1.02	0.98	0.04	(0.01, 0.05)	0.01	< 0.01
% trimmed loin	4.51	4.43	0.08	(−0.04, 0.19)	0.06	0.18
Sirloin, kg	0.85	0.82	0.03	(−0.01, 0.08)	0.02	0.13
% chilled side wt	1.80	1.73	0.07	(0.02, 0.12)	0.02	< 0.01
% trimmed loin	7.99	7.83	0.16	(−0.04, 0.35)	0.09	0.11
Backribs, kg	0.78	0.78	0.00	(−0.05, 0.04)	0.02	0.91
% chilled side wt	1.63	1.64	−0.01	(−0.06, 0.04)	0.02	0.79
% trimmed loin	7.38	7.51	−0.13	(−0.34, 0.09)	0.10	0.23
Backbones, kg	1.96	1.93	0.03	(−0.09, 0.15)	0.05	0.63
% chilled side wt	4.02	3.96	0.06	(−0.08, 0.20)	0.06	0.36
% trimmed loin	18.44	18.37	0.07	(−0.40, 0.54)	0.22	0.76

¹Sources include Boler et al. (2011a, 2012, and 2014), Lowe et al. (2014, 2016b), Tavárez et al. (2014), and Harris (2014).

²Excluded minor pieces include hip bone, blade bone, and minor trim.