Age group Number Pre Hydroxyurea HbF Post Hydroxyurea HbF p- value
<10 11 20.9± 8.68 31.90 ± 8.09 0.001
10-19 26 21.37± 8.06 26.41± 8.16 0.012
20-29 13 19.038± 10.78 23.842± 6.98 0.039
30-39 6 20.95± 6.41 30± 6.32 0.024
40-49 5 19.02± 6.86 35.4± 6.80 0.001