Table 2. Statistics for adjusted measurements of 38,602 individuals at 6, 12, 18, and 24 months after birth.

Trait	Age	N	Mean	S.D.	${\sigma }_a^2$	${\sigma }_p^2$
Heart girth (cm)	6	24, 951	133.61	7.520	14.87 (0.948)	45.13 (1.213)
	12	28, 667	165.04	8.192	17.05 (0.876)	42.85 (1.103)
	18	22, 651	181.69	8.610	16.09 (1.014)	45.46 (1.291)
	24	8, 341	203.58	8.312	16.42 (1.815)	46.93 (2.338)
Hip height (cm)	6	24, 951	105.94	4.305	4.81 (0.306)	13.79 (0.390)
	12	28, 667	122.15	4.201	4.69 (0.252)	12.25 (0.318)
	18	22, 651	131.89	4.286	4.86 (0.291)	12.93 (0.369)
	24	8, 341	138.02	4.301	5.18 (0.514)	12.95 (0.657)

Age: age of month

N: number of adjusted-records

S.D.: standard deviation

${\sigma }_a^2$: the additive variance, with their standard errors (in parenthesis)

${\sigma }_p^2$: the phenotypic variance, with their standard errors (in parenthesis)