CD4 and anemia (phenotype): Levine and colleagues reported that an inverse correlation was found between the risk of anemia and CD4 count; thus, at CD4 counts of 500 per microliter or above, 22.3% of women were anemic versus 30.4% of those with CD4 counts between 200 and 499 per microliter and 58.1% of those with CD counts <200 per microliter (p < .001).