Pubertal delay in children and adolescents with sickle cell disease in eastern Uganda: a cross-sectional study

Growing up is a universal journey, but for children with sickle cell disease, the path can be paved with unexpected obstacles. This inherited condition changes the shape of red blood cells, the tiny carriers that deliver oxygen throughout the body. When these cells become rigid and misshapen, they struggle to flow through narrow vessels, causing pain, organ damage, and a chronic shortage of oxygen. While medical care has improved survival rates, allowing more children to reach adolescence, a quieter complication often goes unnoticed: the timing of puberty. Puberty is the biological transition where a child's body matures into an adult, marked by growth spurts and the development of secondary sexual characteristics. In a healthy body, this process is triggered by a complex hormonal signal that tells the body it is time to grow and change. However, the constant strain of sickle cell disease can disrupt these signals, potentially delaying the arrival of adulthood.

In eastern Uganda, where the burden of sickle cell disease is heavy, researchers set out to understand how this condition affects the timing of puberty. They focused their attention on a large group of children and teenagers, aged eight to nineteen, who were receiving care at the Mbale Regional Referral Hospital. The team wanted to know not only how many of these young people were experiencing delays in their physical maturation but also what factors might be influencing those delays. They looked at the children's growth, their nutrition, their family backgrounds, and the treatments they were receiving. By measuring height, weight, and specific signs of puberty, the researchers aimed to paint a clear picture of the challenges these adolescents face as they navigate the transition to adulthood.

The study involved 407 participants, a mix of boys and girls, all confirmed to have sickle cell disease. The researchers carefully examined each child to determine their stage of development, using a standard system that tracks the physical changes of puberty. They found that a significant majority of these young people were not developing at the expected pace. More than six out of ten participants showed signs of delayed puberty. This delay was even more pronounced among the girls, where nearly three out of four were experiencing a later start to their physical maturation compared to the boys. The average age for girls to begin menstruation in this group was just over thirteen years, a milestone that arrived later than in the general population.

When the researchers dug deeper to find the causes, they discovered that several factors played a role. Being male was actually a protective factor; boys were less likely to experience severe delays than girls. Height also mattered significantly. Children who were taller were less likely to have delayed puberty, while those with shorter stature faced higher odds of waiting longer for their bodies to mature. Nutrition emerged as a key player as well. The study found that children who ate a wider variety of fruits—specifically at least four different kinds every day—were much less likely to have delayed development. This suggests that a diverse diet, rich in different nutrients, might help support the body through this critical growth period.

Interestingly, the study also looked at the treatments these children were receiving. While many were taking medication to manage their disease, the researchers found that the use of hydroxyurea, a common treatment for sickle cell, did not independently cause delays in puberty. However, there was a notable finding regarding the children's own perceptions. Those who felt that their treatment had influenced their sexual development were more likely to be in a category of delayed puberty. The researchers caution that this does not mean the treatment caused the delay. Instead, it likely reflects that children with more severe disease, who require more intensive treatment, are also the ones most likely to experience developmental hurdles. The delay appears to be a result of the disease's overall burden rather than the medicine itself.

The physical toll of the disease was evident in the clinic. Almost every participant reported experiencing painful episodes where blood flow was blocked, and many suffered from frequent infections. Despite these challenges, the study highlighted that the delay in puberty is not just a medical statistic but a lived reality for these adolescents. The researchers noted that the physical changes of growing up are deeply tied to a young person's sense of self and their place among their peers. When puberty is delayed, it can affect confidence and social interactions. The study concludes that doctors and caregivers need to pay closer attention to these signs. Routine check-ups should include careful monitoring of growth and development, along with nutritional advice that encourages a diverse diet. By integrating these assessments into standard care, health providers can better support these children, ensuring they receive the guidance and referrals they need to navigate the complex journey of growing up with sickle cell disease.