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Table 4 Genetic modifiers of HbF level among TI patients. HbF percentages of all TI patients are compared with samples homozygote and heterozygote for XmnI SNP, α-thalassemia or a combination of both

From: Molecular characterization of β-thalassemia intermedia in the West Bank, Palestine

  All samples XmnI SNP (+/+) α-thalassemia Heterozygotes XmnI SNP & α-thalass
N 51 3 5 1
HbF %
 Median 10.4 67.5 26.6 49.1
 Range (min– max) 1.7–83.0 49.1–83.0 1.7–49.1
Hb g/dL
 Median 8.3 8.6 8.7 7.1
 Range (min-Max) 6.4–13.9 7.7–9.8 7.1–9.0