Table 1:

Demographic and clinical characteristics

Demographic or Clinical Parameter	Mean and SD
Total No.	39
Females (No. and % of total)	16 (41%)
Males (No. and % of total)	23 (59%)
Age (yr)	12 ± 2
Hematocrit (%)	23 ± 3
Hemoglobin (g/d/L)a	8.4 ± 1.1
Hemoglobin F (%)b	10 ± 6
Hemoglobin A2 (%)c	4.8 ± 1
Hemoglobin S (%)	84 ± 5
Mean corpuscular volume (mL)d	82 ± 10
Mean corpuscular hemoglobin concentration (mmol/L)e	21 ± 0.6

^aNormal range reference values: Hb = 10–16.

^bHbF < 1%.

^cHbA2 = 2–3.

^dMCV = 75–95.

^eMCHC = 19.0–22.5.