Table 3.
Participant status (N=122).
| Characteristic | Participants, n | |
| Total enrolled | 122 | |
| Participants with completed TCDa exam | 122 | |
| TCD exam classification | ||
| Abnormal | 5 | |
| Conditional | 29 | |
| Normal | 85 | |
| Inadequate | 3 | |
| TCD not yet reviewed | 0 | |
| Hydroxyurea treatment status | ||
| On hydroxyurea at study entry | 22 | |
| Eligible for protocol-directed hydroxyurea | 20 | |
| Ineligible for hydroxyurea | 0 | |
| Temporarily ineligible for hydroxyurea | 1 | |
| Initiated hydroxyurea | 17 | |
| Declined hydroxyurea/alternate therapyb | 8 | |
| Withdrawn after treatment initiationc | 0 | |
| Currently on hydroxyurea | 17 | |
| Completed study | 0 | |
aTCD: transcranial Doppler.
bTransfusion due to history of stroke or abnormal TCD.
cIncludes deceased.