TABLE 2.
Child social looking and affect or behavior by iron status group1
| Outcome variables | IDA, n = 74 | Nonanemic, n = 164 | P-value2 | Covariate(s)3 |
|---|---|---|---|---|
| Social looking toward adults | ||||
| Frequent social looks to mother, % | 42 | 57 | 0.02 | Mother's parity |
| Wary/hesitant behavior | ||||
| Time to approach mother4, s | 35.7 ± 15.4 | 270 ± 61.7 | <0.001 | |
| Time to touch a familiar toy4, s | 15.1 ± 2.1 | 16.3 ± 1.9 | 0.11 | |
| Time to touch a stimulus toy4, s | 17.1 ± 4.6 | 7.4 ± 0.7 | <0.001 | |
| Close contact with mother, s | 334.2 ± 35.6 | 300.1 ± 23.8 | 0.43 | Mother's parity and age, child age |
| Touches of familiar toys, n | 10.7 ± 1.0 | 11.9 ± 0.7 | 0.31 | Child age |
| Touches of stimulus toys, n | 6.8 ± 0.5 | 6.4 ± 0.4 | 0.52 | Child age, gender |
| Affect | ||||
| Time to first smile4, s | 267.4 ± 115.8 | 102.0 ± 27.5 | <0.001 | |
| Laughs and smiles, n | 4.7 ± 0.7 | 4.3 ± 0.5 | 0.51 | |
| Unengaged affect, s | 87.4 ± 21.1 | 55.6 ± 11.5 | 0.15 | |
| Maternal behavior | ||||
| Proportion of time spent talking, % | 6.6 ± 1.4 | 7.4 ± 1.2 | 0.70 |
1
Values are means ± SE or %.
2
P-value refers to the overall F-test/log-likelihood ratio.
3
Covariates were continuous variables except for gender.
4
Time at which 75% of each group showed a given behavior.