Abstract
Elevated foetal haemoglobin (HbF) levels are protective against some manifestations of sickle cell anaemia but the impact on retinopathy is unknown. We report on 123 children with HbSS, 10.6% of whom developed retinopathy. Independent of hydroxycarbamide, children with a HbF <15% had 7.1-fold (95% confidence interval, 1.5-33.6) higher odds of developing retinopathy. In children treated with hydroxycarbamide, those with retinopathy had lower HbF levels compared to children without retinopathy (9% vs. 16%; P = 0.005). We report a protective benefit of elevated HbF regarding retinopathy, and our data suggests induction of HbF with hydroxycarbamide may prevent retinopathy in children.
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