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A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
Published on: January 19, 2024
Should infants be screened for anaemia? A prospective study investigating the relation between haemoglobin at 8, 12,
A Sherriff1, A Emond, J C Bell
1Unit of Paediatric and Perinatal Epidemiology, Institute of Child Health, University of Bristol, 22 Tyndall Avenue, Bristol BS8 1TQ, UK. Andrea.Sherriff@bris.ac.uk
Insights
Low hemoglobin (Hb) levels in 8-month-old infants are linked to poorer motor development by 18 months. Screening for infant anemia at or before 8 months may improve developmental outcomes.
Area of Science:
- Pediatric Health
- Developmental Pediatrics
- Hematology
Background:
- Iron deficiency anemia is a common nutritional deficiency in infants.
- Early childhood development is crucial for long-term health outcomes.
- Hemoglobin levels are a key indicator of iron status in infants.
Purpose of the Study:
- To examine the association between longitudinal hemoglobin measurements in children from 8 to 18 months and their developmental outcomes at 18 months.
- To identify critical hemoglobin thresholds for optimal motor development in early childhood.
Main Methods:
- Utilized data from the Avon Longitudinal Study of Pregnancy and Childhood (ALSPAC).
- Assayed hemoglobin (Hb) levels at 8, 12, and 18 months in a subsample of 1141 children.
- Conducted developmental assessments using the Griffiths Scales of Mental Development at 18 months.
Main Results:
- A significant quadratic relationship was observed between Hb at 8 months and 18-month locomotor development.
- Children with Hb <95 g/l at 8 months scored 6 points lower on the locomotor subscale compared to those with Hb ≥95 g/l.
- Infants with Hb <90 g/l at 8 months showed a 12-point deficit in locomotor scores.
Conclusions:
- Low hemoglobin concentrations (≤95 g/l) at 8 months are associated with impaired motor development at 18 months.
- This threshold (95 g/l) represents the 5th centile of Hb at 8 months.
- Screening for infant anemia may be more effective at or before 8 months to mitigate potential adverse developmental effects.
Aims:
To investigate the relation between haemoglobin in children followed longitudinally from 8 to 18 months, and developmental outcome at 18 months.
Methods:
The Avon Longitudinal Study of Pregnancy and Childhood (ALSPAC) is a longitudinal survey of a geographically defined population of children born in 1991-92. In a randomly selected subsample, blood samples were assayed for Hb at 8, 12, and 18 months; a developmental assessment was carried out at 18 months on 1141 children using the Griffiths Scales of Mental Development.
Results:
There was a strong quadratic association between Hb at 8 months and performance on the locomotor subscale at 18 months. Average scores increased with increasing Hb up to 95 g/l; there was little additional developmental benefit in Hb levels beyond 95 g/l. Infants with Hb <95 g/l at 8 months of age scored on average 6 points lower on the locomotor subscale than infants with Hb >/= 95 g/l; infants with Hb <90 g/l at 8 months scored 12 points lower on the locomotor subscale than children with Hb >/= 90 g/l.
Conclusions:
Low Hb concentrations (= 95 g/l) in 8 month old children are associated with impaired motor development at 18 months. This cut off point corresponds to the 5th centile of Hb at 8 months. The results indicate that if there is an adverse effect of low Hb on developmental outcome, screening may be more effective at 8 months or earlier, rather than after this age. We propose to examine the importance of infant anaemia in relation to more accurate and detailed long term outcomes as the children get older.
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