TABLE 1.

Growth performance and salivary cortisol^a of pigs ranked on residual feed intake at three geographic locations^b

Parameter	Value for groupc								SEMd	P value
	High RFI				Low RFI
	ROI1	ROI2	NI	AT	ROI1	ROI2	NI	AT		RFI × location	RFI	Location
RFI (g/day)	1,237 A	1,108 A	207 B	1,171 AB	−1,030 C	−737 C	−200 C	−956 C	227.6	<0.001	<0.001	0.86
wt (kg), day 70	32.2	33.3	27.4	30.2	33.6	31.9	28.7	28.6	1.93	0.22	0.97	0.27
wt (kg), day 134	83.1 BC	82.3 BC	91.3 AC	85.2 ABC	87.2 ABC	79.5 B	95.2 B	82.8 BC	1.94	<0.001	0.83	0.35
ADFI (g/day)	2,025 BD	2,194 AD	2,033 AB	2,380 A	1,988 BD	1,851 BC	1,586 C	1,942 BCD	74.1	0.005	<0.001	0.005
ADG (g/day)	1,028	902	891	1,131	1,065	847	894	1,077	30.0	0.25	0.44	<0.001
FCE (g/g)	2.05 B	2.62 A	2.40 A	2.11 B	1.91 B	2.39 A	1.80 B	1.84 B	0.088	0.03	<0.001	<0.001
Salivary cortisol concn (ng/ml)	1.76				1.34				0.176		0.06

^aCortisol was measured only in ROI1 pigs on the day prior to slaughter.

^bROI1, Republic of Ireland batch 1; ROI2, Republic of Ireland batch 2; NI, Northern Ireland; AT, Austria; wt, weight; ADFI, average daily feed intake; ADG, average daily gain; FCE, feed conversion efficiency.

^cWithin each row, values that do not share a common letter are different (P ≤ 0.05).

^dLeast-squares means and the pooled standard errors of the means (SEM) are presented.