A pilot study on the changes of event-related potentials in school-aged children with iron deficiency anaemia
1Department of Neurology, Tongji Hospital of Tongji Medical University, Wuhan 430030, China.
Insights
Iron deficiency anaemia (IDA) in children is linked to cognitive issues, measurable by event-related potentials (ERP). Iron treatment improved P300 latencies, suggesting ERPs can detect cognitive changes in IDA.
Area of Science:
- Neuroscience
- Pediatrics
- Hematology
Background:
- Asymptomatic iron deficiency anaemia (IDA) can affect cognitive function in school-aged children.
- Event-related potentials (ERP) offer a potential non-invasive method to assess cognitive function.
Purpose of the Study:
- To investigate the impact of iron deficiency anaemia on ERPs in children.
- To evaluate the efficacy of iron supplementation in improving ERP measures and cognitive function.
Main Methods:
- Seventy school-aged children with IDA were randomized into iron treatment and placebo groups.
- A control group of 30 healthy children was included for comparison.
- Haematological and ERP assessments were conducted pre- and post-treatment (3 months).
Main Results:
- Pre-treatment, IDA groups showed prolonged P300 latencies compared to controls.
- Iron supplementation significantly shortened P300 latencies and normalized haemoglobin levels.
- The active treatment group showed fewer abnormal ERP waveforms post-treatment compared to the placebo group.
Conclusions:
- Event-related potentials (ERP) are sensitive markers for cognitive impairment in children with IDA.
- Iron supplementation effectively improves ERP measures, indicating cognitive recovery.
- ERPs show promise as an objective tool for monitoring cognitive status in pediatric IDA.
Abstract:
Event-related potentials (ERP) were assessed in 70 school-aged children with a diagnosis of asymptomatic iron deficiency anaemia (IDA), based on low haemoglobin and either low serum ferritin or high free erythrocyte protoporphyrin levels. The IDA subjects were randomized into treatment and placebo groups of 35 cases each, and compared with a normal control group of 30 age- and gender-matched healthy subjects without iron deficiency. Further haematological and ERP assessment was carried out after 3 months, during which time the active group received iron supplementation with 10 mg ferrous sulphate, together with vitamin C, malic acid and folic acid. Pre-treatment, both IDA groups had prolonged P300 latencies in comparison with the non-IDA controls (p<0.01). The proportion of cases with distorted wave appearance was more than twice as high in the IDA groups as in the non-IDA controls, although intergroup differences did not reach statistical significance. After treatment, the active treatment IDA group showed a significant increase in haemoglobin levels and shortening in P300 latencies. After treatment, neither value was statistically different from non-IDA controls. There was a decrease in the number of cases with abnormal waveforms in the active treatment group, compared with an increase in the number within the placebo group (P = 0.002). Testing of ERP shows promise as a non-invasive, sensitive and objective marker for assessing cognitive impairment in children with IDA.
