Objective: To provide a comprehensive quantitative review of biological, environmental, and behavioral correlates across domains of cognitive function in sickle cell disease (SCD).
Methods: Forty-seven studies were identified in PubMed, MedLine, and PsycINFO involving 2573 participants with SCD.
Results: Meta-analytic findings across all identified samples indicate that hemoglobin and hematocrit were positively correlated with Full Scale IQ [FSIQ; r = .