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Updated: Aug 7, 2026

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools
Published on: June 20, 2020
Investigation of global developmental delay
L McDonald1, A Rennie, J Tolmie
1Department of Community Child Health, Royal Hospital for Sick Children, Yorkhill, Glasgow, UK. lmcdonald@doctors.org.uk
Insights
Detailed history and examination are crucial for assessing global developmental delay in children. Evidence supports genetic and biochemical screening, but not routine metabolic tests or neuroimaging without specific indicators.
Area of Science:
- Pediatrics
- Developmental Neuroscience
- Clinical Genetics
Background:
- Global developmental delay (GDD) assessment varies significantly among healthcare providers.
- Standardized guidelines are needed for secondary care services managing GDD in preschool children.
Purpose of the Study:
- To develop evidence-based guidelines for assessing and managing preschool children with GDD.
- To clarify the role of various investigations in diagnosing the aetiology of GDD.
Main Methods:
- Comprehensive literature search and evidence review.
- Development of clinical guidelines for GDD assessment.
- Analysis of evidence for genetic, biochemical, metabolic, and neuroimaging investigations.
Main Results:
- Detailed patient history and physical examination are paramount for GDD assessment.
- Evidence supports the screening use of genetic and biochemical investigations.
- No evidence supports routine metabolic investigations or neuroimaging without specific clinical findings.
Conclusions:
- Evidence-based guidelines can optimize the selection of investigations for GDD.
- Judicious use of investigations, guided by clinical findings, is essential for determining GDD aetiology.
Abstract:
The investigation of global developmental delay in preschool children varies between centres and between paediatricians. Following a literature search and review of the evidence base, guidelines were developed to assist in the assessment and management of such children presenting to secondary level services. Evidence supporting the use of genetic and biochemical investigations on a screening basis was found, but there was no evidence to support the use of metabolic investigations or neuroimaging in the absence of other positive findings on history or examination. Detailed history and examination are paramount in the assessment of children with global developmental delay. Investigations can be a useful adjunct in determining aetiology. Evidence based guidelines have been developed to assist doctors in the selection of appropriate investigations for this group of children.
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