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Table 1 Analysis of 192 samples with suspected HbA2' with varying S-window peaks.

From: An insight into the suspected HbA2' cases detected by high performance liquid chromatography in Pakistan

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
  1. * Difference in HbA2 levels in three groups was statistically not significant
  2. The table shows retention time of small S-window peaks along with their HbA2 percentages and the frequency of additional cases suspected of β-thalassaemia minor among 192 total cases.