. Author manuscript; available in PMC: 2009 Feb 1.

Published in final edited form as: Am J Clin Nutr. 2008 Dec 10;89(2):525–532. doi: 10.3945/ajcn.2008.26591

Table 2.

Tracking (linear correlation coefficients) among PF and Hgb values, respectively, at different ages. Data for 63 infants who completed the intervention to 5.5 mo

Age	4 mo	5.5 mo	7.5 mo	9 mo	12 mo	15 mo	18 mo
Plasma ferritin concentration (PF)
1 mo	0.568 ^a	0.322 ^a	0.319 ^a	0.387 ^a	0.367 ^a	0.293	0.327 ^a
4 mo		0.716 ^a	0.609 ^a	0.738 ^a	0.543 ^a	0.348 ^a	0.323 ^a
5.5 mo			0.916 ^a	0.802 ^a	0.799 ^a	0.435 ^a	0.540 ^a
7.5 mo				0.718 ^a	0.825 ^a	0.453 ^a	0.557 ^a
9 mo					0.724 ^a	0.526 ^a	0.393 ^a
12 mo						0.678 ^a	0.682 ^a
15 mo							0.346 ^a
Hemoglobin concentration (Hgb)
1 mo	0.107	0.147	-0.171	-0.106	-0.080	0.092	-0.059
4 mo		0.639 ^a	0.539 ^a	0.412 ^a	0.238	-0.012	0.128
5.5 mo			0.581 ^a	0.449 ^a	0.191	0.052	0.260
7.5 mo				0.646 ^a	0.297 ^a	0.418 ^a	0.507 ^a
9 mo					0.508 ^a	0.527 ^a	0.402 ^a
12 mo						0.670 ^a	0.534 ^a
15 mo							0.585 ^a

correlation statistically significant (p<0.05)