4-6 years 7-11 years 12-14 years Total
SCD group Boys 44 38 31 113
    38.9% 33.6% 27.4% 100.0%
  Girls 32 28 39 99
    32.3% 28.3% 39.4% 100.0%
  Total 76 66 70 212
    35.8% 31.1% 33.0% 100.0%
Control group Boys 44 38 31 113
    39.8% 32.7% 27.4% 100.0%
  Girls 32 28 39 99
    31.3% 29.3% 39.4% 100.0%
  Total 76 66 70 212
    35.8% 31.1% 33.0% 100.0%
Table 2: Distribution of the sickle cell and control groups according to gender.