Table 1 Analysis of 192 samples with suspected HbA2' with varying S-window peaks.
S-Window Peaks | Total Cases n (%) | Retention Time Range (min) Mean ± SD | HbA2* Range (%) Mean ± SD | Cases with HbA2 > 3.5% n (%) | Cases with HbA2+suspected HbA2'>3.5% n (%) | Additionally suspected β-thalassaemia minor n (%) |
|---|---|---|---|---|---|---|
<1% | 123 (64.2) | 4.33-4.62 4.59 ± 0.04 | 1.0-7.0 3.22 ± 1.41 | 27 (22.6) | 47 (39.5) | 20 (16.9) |
1-2% | 63 (32.6) | 4.32-4.62 4.59 ± 0.05 | 1.3-6.3 3.07 ± 1.08 | 10 (15.9) | 51 (81) | 41 (65.0) |
>2% | 6 (3.1) | 4.44-4.61 4.56 ± 0.06 | 2.3-5.2 3.67 ± 1.05 | 3 (50) | 6 (100) | 3 (50) |
All cases | 192(100) | 4.32-4.62 4.58 ± 0.05 | 1.0-7.0 3.19 ± 1.30 | 40 | 104 | 64 |