Table 3. Pearson correlation coefficient between mean maximum velocity relating to transcranial Doppler and hematological parameters, for groups I and II.

	Pearson coefficient
Hematological parameters	Group I (n = 62)	Group II (n = 23)
Hematocrit	- 0.38*	- 0.29
Hemoglobin	- 0.32*	- 0.24
Reticulocyte percentage	0.09	0.49*
Platelet count	Platelet count	0.18
Leukocyte count	0.14	0.22
Hemoglobin S percentage	0.18	0.17
Hemoglobin F percentage	- 0.16	- 0.35

Pearson's correlation coefficient results were classified as follows: Negative value: inverse correlation; Positive value: positive correlation; None: 0.00; Weak: between 0.01 and 0.29; Medium: between 0.30 and 0.59; Strong: between 0.60 and 0.89; Very strong: between 0.90 and 0.99; and Perfect: 1.00.

^*Statistical significance: P < 0.01.