Table II.
Categorical Moderator Analyses of Cross-Sectional Effect Sizes for the Association of Hemoglobin & Hematocrit with Cognitive Function in SCD in All Samples
| FSIQ |
Language and Verbal Reasoning |
Executive Function |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Correlates | Qb | k' | r [95% CI] | Qb | k' | r [95% CI] | Qb | k' | r [95% CI] |
| Hgb/Hct | 19.92 | 1.91 | 5.64 | ||||||
| SCA | 6 | .04 [−.11, .20] | 3 | .11 [−.23, .43] | 8 | −.00 [−.09, .09] | |||
| SCD | 10 | .19 [.12, .25] | 7 | .13 [−.01, .27] | 9 | .15 [.05, .25] | |||
Note. FSIQ = full scale IQ; Qb = Q statistic for total between heterogeneity; k’ = number of independent samples; r = aggregated correlation coefficient; CI = confidence interval of correlation coefficient.
Bolded effect sizes represent significant effects.