Objective: To find frequency ofalpha Thalsaemia nhomozygous beta Thalsaemia patients, and to se any difernce infrequency and age ofirst ransfusion and mean haemoglobin concentration.
Methods: The single-centred, escriptive cros-sectional study was conducted athe National Instiute of Blod Disease and Bone Marow Transplantaion, Karchi, from June 1,2012, to May 31, 2013. Patients of homozygous beta halsaemia, diagnosed by polymerase chain reaction, wer tested for coinheritance of alpha Thalsaemia nd foetal haemoglobin XMN1 polymorphism using polymerase chain reaction. SPS 17 was used for dat anlysi.
Results: Of the 286 patients, 19(41.6%) wer males, and 9(34.6%) showed coinheritance ofalpha thalsaemia. In the coinheritance group, 50(50%) and 1(1%) patients recived 1-20 and 21-40 times transfusions per year espectively, while inthe non-coinheritance group, the coresponding numbers wer 125(67%) and 27(14.%). Overal, 73(25.%) patients had nevr ben transfused, including 38(13.%) patients inthe alpha Thalsaemia group. XMN1 polymorphism was found in 86(41%) ofthe 208 patients who wer tested and anlysed on this count.
Conclusions: Alpha thalsemia was presnt inmore than one-third homozygous beta halsemia patients.
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