Table 1.
Group characteristics for participants contributing imaging and cognitive data.
| Placebo (N = 11) | ESA (N =33) | Term (N = 23) | Placebo vs. ESA | ESA vs. Term | ||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | p | p | |
| Age at Testing (mos.) | 48.55 | 3.04 | 48.91 | 3.83 | 45.09 | 2.13 | .77 | <.001 |
| Gestational age at birth (weeks) | 27.88 | 1.39 | 27.22 | 1.69 | 39.04 | 1.38 | .25 | <.001 |
| Gender (M/F) | 6/5 | 18/15 | 10/13 | .99 | .41 | |||
| Full Scale IQ | 78.73 | 21.02 | 92.21 | 16.17 | 102.30 | 13.00 | .03 | .016 |
| Income | 3.73 | 1.74 | 4.76 | 2.14 | 5.00 | 1.66 | .16 | .64 |
| Maternal Education | 4.27 | 1.10 | 4.82 | 1.24 | 5.36 | 1.36 | .20 | .13 |
| Maternal age | 24.09 | 3.83 | 27.82 | 6.68 | 29.45 | 7.46 | .09 | .40 |
| Number family moves | 2.73 | 1.90 | 1.33 | 1.32 | 1.23 | 1.44 | .01 | .78 |
| Number children under 6 | 2.36 | 1.43 | 1.55 | .67 | 1.68 | .78 | .01 | .49 |
| Ethnicity: Hispanic/Anglo | 4/7 | 13/20 | 14/9 | .86 | .11 | |||
| Primary Language: English/Spanish | 11/0 | 28/5 | 20/3 | .82 | ||||
| Socioeconomic Composite: SEC | −.12 | .71 | −.02 | 1.09 | .05 | .23 | .77 | .81 |
| Family Stress Composite: FSC | .99 | 1.08 | −.10 | .78 | −.20 | 1.00 | .001 | .65 |
Note: independent samples t-tests and chi-square analyses compared groups (though the chi square involving placebo group vs. ESA could not be calculated for primary language because one entry was zero). Higher SEC indicates greater income and maternal education. Higher FSC corresponds to more family moves, more young children in the home and younger mothers.