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. 2012 Dec;130(6):1038–1045. doi: 10.1542/peds.2011-3838

TABLE 2.

Growth Rate in z Scores and Iron Status Indices in the 2 Intervention Groups, CF and EBF, a Categorized According to Infant Diet During the Study Period

Variables CF (n = 50) EBF (n = 50) P value
Wt gain from 0–4 mo b −0.54 (1.01) −0.42 (1.04) .51
Length gain from 0–4 mo b −0.41 (0.85) −0.26 (1.14) .40
Gain in HC from 0 to 4 mo b −0.47 (0.84) c −0.52 (1.03) .80
Wt gain from 4 to 6 mo −0.02 (0.31) −0.01 (0.42) .90
Length gain from 4 to 6 mo 0.03 (0.50) 0.04 (0.51) .96
Gain in HC from 4-6 mo 0.06 (0.40) 0.06 (0.48) .99
Wt gain from 0 to 6 mo −0.55 (1.12) −0.46 (1.17) .71
Length gain from 0 to 6 mo −0.41 (0.95) −0.37 (1.18) .85
Gain in HC from 0 to 6 mo −0.36 (0.87) c −0.41 (1.01) .80
Hb (g/L) d 113.9 (6.1) 113.7 (7.3) e .91
MCV (fl) d 74.4 (3.3) 73.4 (2.6) e .11
SF (µg/L) d 70.0 (73.3) f 44.0 (53.8) f .02
TIBC (µmol/L) d 59.2 (9.2) 60.8 (10.1) .43
RDW d 13.0 (0.7) 13.2 (0.7) e .13

Data are mean (SD) unless otherwise indicated. HC, head circumference.

a

One mother-infant pair was incorrectly instructed to follow directions for the EBF group and was therefore analyzed in that group.

b

CF n = 60; EBF n = 59.

c

One missing value.

d

Hb, MCV, and RDW n = 98; SF n = 94; TIBC n = 95.

e

Mean (SD) calculated with values from a blood sample taken 2 weeks later than 6 mo from 1 infant because some indices were inadvertently not examined on the first sample and were therefore examined on the second sample.

f

Data are median (interquartile range).