The expected normal range for HbA2
is between 1.7 and 3.2% in normal subjects, while in β-thalassaemia carriers is between 4.0 and 7%.
HbA2 values are considered borderline when between 3.2 and 3.8%.
Samples with these levels need further investigation
The normal range for HbF is usually less than 1.5% of total haemoglobin
you go for further confirmatory by repeating the same test for her
any way these are the tests she is suspected for beta Thalassemia