Table 6.
Pooled Regression Analysis of Covariance of Pre-Transfusion Hgb with Five Bayley Subscales*
| Male (N=17) | Female (N=13) | Sex Interaction | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B† | SE | t | p | B† | SE | t | p | Difference** | SE | t | (p / M=F) | |
| Cognitive | 0.959 | 1.167 | 0.82 | 0.420 | −1.264 | 0.837 | −1.51 | 0.145 | 2.223 | 1.436 | 1.55 | 0.135 |
| Expressive Language | 0.360 | 0.972 | 0.37 | 0.714 | −1.252 | 0.725 | −1.73 | 0.098 | 1.613 | 1.212 | 1.33 | 0.196 |
| Receptive Language | −0.428 | 0.759 | −0.56 | 0.578 | 0.264 | 0.537 | 0.49 | 0.628 | −0.692 | 0.938 | −0.74 | 0.468 |
| Fine Motor | 0.455 | 0.683 | 0.67 | 0.512 | −0.115 | 0.502 | −0.23 | 0.822 | 0.569 | 0.846 | 0.67 | 0.508 |
| Gross Motor | 1.758 | 1.232 | 1.43 | 0.167 | −3.758 | 1.395 | −2.69 | 0.013 | 5.516 | 1.864 | 2.96 | 0.007 |
| Mean | 0.621 | 0.664 | 0.94 | 0.359 | −1.225 | 0.528 | −2.32 | 0.030 | 1.846 | 0.851 | 2.17 | 0.041 |
*
Controlling for birth weight, GA, and chronological age at cognitive assessment; Four participants had missing hemoglobin values and are excluded from this analysis
†
B, Beta coefficient estimate, fitted slope of relationship between predictor (ptHb) and outcome variable (Bayley subscale raw score or mean)
SE, Standard Error of Beta Coefficient
**
Difference in Beta coefficients between males and females