Table 3.

Behavioral, morphological and physiological characteristics of clusters obtained from a hierarchical clustering analysis on principal components based on social behaviors measured at 21 and 42 days of age¹.

n	Females			Males			p values5
	Cluster 1 ‘Inactive’	Cluster 2 ‘Avoiders’	Cluster 3 ‘Active’	Cluster 1 ‘Inactive’	Cluster 2 ‘Avoiders’	Cluster 3 ‘Active’	Cluster	Sex	Cluster × Sex
	36	13	9	22	11	29
Behavioral traits2
Time lying	0.58 ± 0.03a	0.50 ± 0.04ab	0.45 ± 0.04b	0.54 ± 0.03ab	0.58 ± 0.04ab	0.54 ± 0.03ab	0.09	0.08	0.03
Time standing	0.23 ± 0.06a	0.32 ± 0.06b	0.36 ± 0.06b	0.25 ± 0.06ab	0.25 ± 0.06ab	0.30 ± 0.06ab	< 0.001	0.02	0.02
Time ingesting	0.02 ± 0.003	0.02 ± 0.004	0.02 ± 0.005	0.01 ± 0.004	0.01 ± 0.005	0.02 ± 0.003	0.13	0.11	0.79
Time suckling	0.15 ± 0.02	0.14 ± 0.02	0.12 ± 0.03	0.15 ± 0.02	0.15 ± 0.03	0.17 ± 0.02	0.77	0.02	0.10
Production traits
Weight (kg)	7.2 ± 2.9	7.6 ± 3.0	9.6 ± 3.0	7.5 ± 2.9	8.5 ± 3.0	8.4 ± 2.9	< 0.001	0.95	0.08
ADG3 (g/d)	211 ± 49	237 ± 52	276 ± 54	207 ± 50	247 ± 53	251 ± 50	0.006	0.66	0.69
Blood parameters
5-HT (µmol/L PRP4)	14.0 ± 4.5	14.8 ± 4.9	11.7 ± 5.2	18.6 ± 4.7	15.2 ± 5.0	15.3 ± 4.6	0.35	0.10	0.60
Haptoglobin (mg/mL)	2.3 ± 0.77	1.2 ± 0.84	1.4 ± 0.90	2.4 ± 0.80	2.5 ± 0.86	1.2 ± 0.78	0.02	0.22	0.19
dROM (CARRU)	914 ± 43	842 ± 61	796 ± 74	902 ± 51	995 ± 66	868 ± 47	0.22	0.09	0.24
FRAP (µg/mL)	67 ± 3.6	69 ± 4.2	68 ± 4.7	66 ± 3.9	67 ± 4.5	68 ± 3.7	0.69	0.69	0.84

¹LS-Means ± S.E.M.;

²Proportion of total observation time;

³ADG, average daily gain;

⁴PRP, platelet-rich plasma;

⁵Letters indicate differences between groups as estimated by post-hoc test with Tukey adjustment for comparing multiple groups (p < 0.05).