Table 4.
Low cord blood ferritin (<75 μg/L) and infant ABR at 10 months (N=45)a
| Low cord blood iron status | Normal cord blood iron status | F(1,42) | p | Effect sizeb | Significant background variables | |
|---|---|---|---|---|---|---|
| N | 19 | 26 | ||||
| Absolute latencies (ms) | ||||||
| Wave I | 1.65 (0.17) | 1.57 (0.12) | 5.50 | 0.02 | 0.58 | Length-for-age z-score |
| Wave III | 4.12 (0.26) | 4.06 (0.21) | 0.94 | 0.34 | 0.25 | |
| Wave V | 6.11 (0.23) | 6.00 (0.17) | 3.69 | 0.06 | 0.62 | |
| Interpeak latencies (ms) | ||||||
| Wave I–III interval | 2.47 (0.20) | 2.49 (0.17) | 0.20 | 0.66 | 0.12 | |
| Wave III–V interval | 2.00 (0.17) | 1.94 (0.15) | 0.95 | 0.33 | 0.39 | |
| Wave I–V interval | 4.47 (0.18) | 4.43 (0.16) | 0.24 | 0.62 | 0.25 | Length-for-age z-score |
| Amplitude (μV) | ||||||
| Wave I | 0.15 (0.06) | 0.18 (0.06) | 4.64 | 0.04 | 0.61 | |
| Wave III | 0.22 (0.08) | 0.25 (0.08) | 2.35 | 0.13 | 0.47 | |
| Wave V | 0.27 (0.08) | 0.31 (0.07) | 2.16 | 0.15 | 0.52 |
a
Values are mean (SD). Statistical significance was determined by analysis of covariance controlling for length-for-age z-score at 10 months as indicated. Significant differences are shown in bold.
b
Moderate to large effect sizes are shown in bold.