TABLE 1.

Primary Stroke Prevention Maintenance 12 Months Post-Program Implementation at the 5 Participating Sites in Kano and Kaduna, Nigeria

Study Site	Minimum Estimated Number of Children With SCD Seen Weekly (N)	Estimated Wait Time to be Seen in SCD Clinic (Hr)	TCD Evaluation as Standard of Care 12 Months Post-Implementation on Clinic Days	Children Receiving TCD Services on Clinic Day (N)	Children Receiving TCD Services on Non-Clinic Days (N)
Aminu Kano Teaching Hospital, Kano	80	2	Yes, Tuesday	15	10
Murtala Muhammad Specialist Hospital, Kano	360	2	Yes, Monday-Friday	15	30
Hasiya Bayero Pediatric Hospital, Kano*	108	3	Yes, Wednesday	15	0
Muhammad Abdullahi Wase Specialist Hospital, Kano*	42	2	Yes, Tuesday and Thursday	3-4	5
Barau Dikko Teaching Hospital, Kaduna	45	2	Yes, Thursday	18	10

Aminu Kano Teaching Hospital, Murtala Muhammad Specialist Hospital, Barau Dikko Teaching Hospital are the clinical trial sites for the SPRING trial.

^*Hasiya Bayero Pediatric Hospital and Muhammad Abdullahi Wase Specialist Hospital in Kano were the referral sites for the trial. All sites provided TCD screening as standard of care for children with sickle cell anemia ages 5 to 12 years old.

SCA indicates sickle cell anemia; SPRING, Stroke Prevention Trial in Nigeria study; TCD, transcranial Doppler velocity.