TABLE 5:
Full-scale intelligence quotient as a function of MR imaging findings and hematocrit
| Hematocrit ≥ 27 | Hematocrit < 27 | Average FSIQ | |
|---|---|---|---|
| Normal MR imaging findings | 86.8 ± 9.9 | 77.5 ± 9.8 | 81.2 ± 10.7 |
| n = 8 | n = 12 | n = 20 | |
| Abnormal MR imaging findings | 75.0 ± 16.5 | 69.3 ± 14.3 | 71.0 ± 14.3 |
| n = 3 | n = 7 | n = 10 | |
| Average FSIQ | 83.5 ± 12.4 | 74.5 ± 12.0 | 77.8 ± 12.7 |
| n = 11 | n = 19 | n = 30 |
Note.—FSIQ indicates full-scale intelligence quotient, as measured by the WISC-III in children cross-stratified by hematocrit and MR imaging findings. Multivariate analysis showed a significant effect of MR imaging findings on full-scale intelligence quotient (one-tailed, P = .016) and of hematocrit on full-scale intelligence quotient (one-tailed, P = .038). There was no significant interaction between MR imaging and hematocrit (P = .717), suggesting these factors are independent predictors of full-scale intelligence quotient.