. 2018 Winter;18(4):308–317. doi: 10.31486/toj.17.0044

Table 6. Correlation Coefficients (r) Between Indicators of Clinical Status and Lymphocyte Proliferative Responses to Phytohemagglutinin (PHA) (corrected for baseline ³H-thymidine uptake) in Children With Sickle Cell Disease.

Variable	PHA 2.5 μg/mL	PHA 5 μg/mL	PHA 10 μg/mL	PHA 15 μg/mL
Retinol binding protein	0.242^a	0.307^a	0.349^a	0.367^a
Health score^b	−0.319^a	−0.272^a	−0.287^a	−0.326^a
Pain crises	−0.252^a	−0.182	−0.195	−0.195
Units of blood	−0.195	−0.243^a	−0.266^a	−0322^a
Infections	−0.151	−0.138	−0.172	−0.042

^{^a}

The (r) value is significantly different from zero (P < 0.05).

^{^b}

Health score is the sum of the number of episodes of pain crisis, infection, hospital admission, and/or blood units received.

Table 6. Correlation Coefficients (r) Between Indicators of Clinical Status and Lymphocyte Proliferative Responses to Phytohemagglutinin (PHA) (corrected for baseline 3H-thymidine uptake) in Children With Sickle Cell Disease.