TABLE 2.

Baseline Demographics and Characteristics of Children With Sickle Cell Anemia Ages Between 2 to 12 Years Receiving TCD Screening as Standard Care at the Our Hospitals in Kano and 1 Hospital in Kaduna, Nigeria

Variables	Children With SCA* (N=3296)
Age, median (IQR) (y)	7.0 (6)
Sex, male (%)	50.8
TAMMV, mean (SD) (cm/s)	140.13 (32.28)
Normal (<170 cm/s) (%)	79.7
Conditional (170-199 cm/s) (%)	12.0
Abnormal (≥200 cm/s) (%)	6.1
No signal (%)	1.9

^*Children with SCA living in Kano Nigeria, who were approached and agreed to receive the TCD screening with complete data on age and sex.

IQR indicates interquartile range; TAMMV TCD, time-averaged mean of the maximum velocity of transcranial Doppler value; SCA, sickle cell anemia.