Group of patients   N. cases   Hb g/dl   Hb F %   EPO mU/l   Glob. synth. alpha/non-alpha   Ret. ‰
Sub-silent beta thal int  33  10.1 ± 1.0  20.5 ± 18.2 3.0 → .70.6  41.22 ± 32.00 11.66 → 136.6  2.10  31
Evident beta thal int  41  8.3 ± 1.16  33.40 ± 28.04 6.80 → 85.0  95.83 ± 64.33 17.84 → 218.97  2.20  60
beta thal int in double heterozygous beta thal + triplicated alpha  58  10.0 ± 1.38  5.15 ± 3.9 2.0 → 19.3  28.45 ± 17.11* 7.85 → 60.72  2.50  30
Hb H disease  15  9.4 ± 1.2  < 1  32.88 ± 12.11**  0.52  28
Thal major  24  10.4 ± 1.0  7.7 ± 8.5*** 1.60 → 40.9  46.83 ± 40.78 9.82 → 129.59   17
Healthy non-thal subjects  53  14.4 ± 1.1  <1  11.90 ± 3.3  ~1.0  3
Iron-deficient non-thal subjects  42  8.7 ± 1.2  <1  160.10 ± 312.6 2.7 → 1960.0   8