Table 4.

Association between risk level of Cerebral Blood Flow Velocity and age group.

Hb genotype status	Age classification	TCD group			p-value
		Normal	Conditional	Abnormal
HbSS	<5 years	74(59.6)	40(32.3)	10(8.1)	0.043*
	5–10 years	68(59.1)	32(27.8)	15(13.1)
	11–16 years	87(71.9)	20(16.5)	14(11.6)
HbSC	<5 years	6(100.0)	0(0.0)	0(0.0)	0.595
	5–10 years	13(92.9)	1(7.1)	0(0.0)
	11–16 years	8(100.0)	0(0.0)	0(0.0)

^*Significant